Starting with the price, I bought it for €140, I believe that even though I am very satisfied with the case, it is not worth buying for more than €150. Now let's get to the "case"!

Excellent case, spacious (I have an ATX motherboard, GPU 7900 GRE inside) and with very good airflow and comfortable for cable management. It comes with two dust filters (one on top and one on the bottom) and 4 fans (3 front for intake and 1 rear for exhaust), pre-installed and connected to a fan hub from the company, which are extremely quiet, even at 100% usage that I experimentally set, the noise does not correspond to their operation. (Of course, they were no longer silent, but you understand what I mean). The ARGB is very beautiful and has many options, also any other device with ARGB connected to the ARGB port of the motherboard (in my case GPU, bracket, CPU cooler, and case fans) changes color too through the case, which for me is a positive and convenient feature as I do not want multicolors among the parts and peripherals; for some others, this may be a negative. Is its price a bit high? Maybe, depending on everyone's budget. But is it worth it for what it offers? Absolutely, I believe it is completely buck for buck in value.

Fantastic case.
It has many pros and a few not so pros.
Major pros:
1. Beautiful like a candy. The crystal is crystal clear and makes the case a showcase.
2. Fantastic Air Flow. With 4 argb fans (3x120 front and 1x140 rear) and a quality controller.
3. Quiet. It doesn't have soundproofing, of course, no mesh case has soundproofing, but the 4 fans it has are silent. So it depends on what you will put for AIO or CPU Cooler, power supply, and graphics card.
4. Quality construction. Everywhere is made of good quality steel. Sturdy construction.
5. Attention to detail. Thumb screws everywhere externally and in some places internally (hdd caddy, ssd panel). Removable - movable card brackets. 2 additional slots for ssd in the front.
6. Cable management+++. Holes in the right places and plastic panels to hide everything. Particularly satisfied with how the cables go to the front ssd panel.
7. Filters everywhere. Front, top, bottom all detachable.
8. Ample space for the GPU. I emphasize, only for the GPU.
Not so pros:
1. Front Panel. Good and beautiful Power/reset-argb control/1 x usb3/1 x usb3 type-C/Stereo out/Mic out. At this price, I would like 2 x usb 3, 2 x usb 2, and the stereo/mic to be in 1 jack.
2. Mobo/ram clearance. Yes, it has a little, but very little. If you see in the photo, I have installed the Arctic liquid freezer ii which is bulky and covers the ram and a significant part of the rear fan. To install/remove ram or to connect/disconnect cpu fan/argb, you have to remove the radiator. I had to buy low profile ram otherwise it wouldn't fit. Maybe if I had installed a bequiet quiet/pure loop 240, I wouldn't have had any issues.
3. Space for radiator. In the top, it is sufficient for a 240, but for anything else, you don't have the option of where to place it. That is, if you want to move it all to the front, you will have to drill holes in the chassis because it doesn't have enough holes and moreover, it doesn't go very far forward. If you wanted to do something like that, it will protrude beyond the filter and there will be a height difference + there won't be a way for the air to escape. Now, I wouldn't put a 280 radiator, it will take 2 140 fans no problem, but the radiator will find the standard VRM. Solutions like putting the radiator in the front are unacceptable for me since the heat it generates is significant and it's not meant to be inside the case, not to mention it will ruin the aesthetics of the argb.
4. The metal plate above the PSU is perforated for airflow and beautiful, but unused. It could have holes for fans or cables or ssd.
Either it's just me being unlucky:
1. One motherboard standoff wouldn't screw in - it was loose on the chassis and I used a washer. Unacceptable at this price.
2. The glass is supported only by its 4 screws and if you put plastic toys inside, you will have to screw it vertically on the desk and this has the risk of it coming off and breaking.

To conclude and not to bother any longer:
I don't regret the purchase since it does what it does well. It is a real gem to have it on the desk and stare at it for hours.
If I were to build another high-performance system and buy a case over 100 euros, I would go straight for the Lian Li Lancool III and even though I would have to pay a super premium for the dust filters that are not included there and for a quality 140 argb fan for the rear (it has one without argb) because these two factors made me prefer the Be Quiet! Pure Base 500 FX.
I hope I helped! Happy building!

Beautiful and well-built case. It can fit almost everything inside (not tested with a front-mounted radiator, and it seems to have a 1.5 cm margin with a 342 mm card with the pre-installed front fans), however, compared to its predecessor, which was a full tower case (Coolermaster HAF-X), the hardware installation was quite "painful" in the Pure Base. This, of course, is something that rarely happens, so everything is OK. Its lighting is powerful and has several options (or even off) to cover if not all, most tastes. The fans are quite silent, and the airflow is also sufficient for an air-cooled high-end PC. There are filters everywhere, and they are easy to clean (the front one just requires a little more effort because the front panel needs to be removed first). The metal side panel has a layer of soundproofing material. It is also complete in terms of what comes with the case (screws, cable management straps, etc.). The only negative is the presence of only one USB 3.0 port on the front panel, while it could easily have had at least one more.

I tried it and built with it for a few months, so I can say a lot.
Spacious for ATX motherboards - E-ATX will find it more difficult and will require more skill to bring the cables without many problems. The plastic on the column that says Bequiet comes out and we have better access in the case of large motherboards - but the column itself also comes out.

I even put a 7900 XTX in a Gigabyte Elite implementation and it fit leaving three cm of space.
It is a heavy case with thick metals - no comparison to the cheap aluminum ones for 50 euros. The FX also has four fans, a fan/ARGB controller with three additional empty slots, so that's perfect. You can put them all on one header if you want and don't be afraid to burn something since it also has extra power.

You can even fit a 280mm cooler on top with careful cable management - 240mm fits easily.
On the back of the motherboard, you have about 2-3 centimeters to hide cables and many can be hidden behind the PSU cover. There is also soundproofing material on the side behind the motherboard, and three dust filters (the top and front are magnetic). The front usually requires 'hands' to come off - it may be tighter than expected, but once it comes off, we have immediate access to the filter and fans.

Overall, a very good case for max 120€ - from there on it becomes very expensive without any particular reason.
Here are more photos to see: https://8bitz.gr/3546/reviews/bequiet-pure-base-500-fx-review-to-prosito-argb-case-ananeothike/