I got it as an amateur - I've only used it a few times of course - but those times I really put it to work. It doesn't struggle anywhere. I'm not a professional to know what the others do - but it breaks concrete very easily. It's heavy but manageable.

Yesterday I used it for the first time and I loved it.
3 hours of breaking concrete and today my hands are fine.
An old one (from the decade) that I have is both weaker and heavier.
If I had used my old one for three hours of breaking concrete, today my hands would be completely stuck.

Awesome tool!!!! Very powerful!!!! I used it for 4 hours straight, simply exceptional tool!!

I bought it for amateur use, I wanted to break a mosaic floor of about 7 m². I read good reviews and the seller at the store told me that this particular one sells quite well. As a first experience, I was quite satisfied, I did my job easily and quickly. Now, as for the handle it has and it is short, I was sitting in Cuba, so it didn't tire me in the middle. I would have liked it to have a longer cable, but this is solved with a small extension cord that I used.

Perfect for its job. I have used it for concrete, tiles, and bricks.
For delicate work, use something else though, this one is powerful.

It's worth the money you will spend. For the amateur, it is excellent. Its blades are 17mm. I use it professionally and consider it a medium-power and lightweight tool. The cost is extremely low. I am attaching a relevant video of a test on a cement piece.
https://youtu.be/_DXlHJYPWWI

The only downside is that it has a small handle and needle, and after prolonged use, the waist hurts. Other than that, it's super, I didn't expect it to break mosaic and concrete without any problem or difficulty!

9/6/2022**
I drilled an 80x80 concrete slab with a thickness of 20 inches, for a slab! New photos of the hole

Very good tool. Powerful and relatively lightweight for its kind. Great for amateur use, breaking stones and concrete is a breeze. It has plenty of power and it's very positive that its anti-vibration handle actually does the job. Before each use, it needs a little grease in the position it has, and it's ready to go. The only thing I would like is a slightly longer cable because it's a bit annoying when working with a reel.
Super!

I bought it for amateur use. It is very powerful, it doesn't make much noise, it has a convenient handle, a short two-meter cable like all Chinese ones, it doesn't get too hot during prolonged use, it is not too heavy for its power category. I also bought a wider chisel from TOTAL. The chisel and its needle are close together, so after a while my waist hurts from bending over. Finally, for its price, it has a very good construction.