It has continuous problems, for example it takes about 2-3 hours to recognize the routers that connect to it as soon as you unplug and plug them back in, it has a problem with upload, for some reason it "chokes" it, and finally twice in a year it froze for about 5-6 hours and didn't provide internet anywhere, and then everything started working normally without any reason.

Simple PnP switch with a kit (ears) included and adjustable to fit into a rack. It has a fan on the sides that you will hear if the environment is very quiet. However, this is not a problem for computer rooms, for example.

Such a switch was purchased for a small workshop in 2011 or 2012. In early 2015, after a 15-day rest, when we turned it on, it started having issues. It would turn on but not function properly (only the power would flicker). Then, it started working somewhat better (after being plugged into the socket for a day), but now, 3 months later, it has completely stopped working (the same power issue persists and nothing happens).

We opened it up to see if there was a capacitor that needed to be replaced, but there wasn't. All the components are in good condition, and visually, the circuit board looks fine. I can't invest any more time into it.

Although there were no issues throughout the years and it never froze or required a restart, I don't consider a switch reliable if it breaks down in 3-4 years. Maybe it was just bad luck. However, there are similar switches available on the market that are cheaper (even -Link ones). They might be better, apart from being cheaper. Of course, only time and luck will tell.

--edit 20-4-15
After a 15-day rest and possibly due to the weather warming up (humidity decrease, etc.), the switch started working again when I plugged it into the socket. This way, it was saved from being thrown away, at least until it breaks down again for the third time (and maybe permanently).

--edit 18-4-16
Finally, in late 2015 (after 3-4 years) of continuous (almost) operation, it gave up. Now, it doesn't turn on or do anything. I opened it up and found that the issue is with the internal power supply, which is not providing voltage to the circuit board. Probably by replacing it with the same or a compatible one (I think it provided 5 volts), the switch will work again. It is a separate spare part, easily replaceable and far from the circuit board. However, I didn't investigate further.

The switch was replaced with a TP-Link 24-gigabit switch with a five-year warranty.