In general, a good bike shop + workshop, but you can get into not the most friendly mechanics. There was also a case that after I took the wheel with the replaced bushing, I discovered that during the replacement they had lost the nut and spring, which were thrown on the axle from the opposite side of the eccentric. Unfortunately, I only discovered this at home (I didn't pay attention when accepting the wheels). But fortunately, we managed to solve the problem by installing the nut and spring from the axle from the old bushing.
A normal bike shop. Everyone who is interested in bicycles knows about it. There is always a lot of stuff available, which is very convenient. I can't say anything about the workshop, I used it once sooooo long ago.
I came to transfer the chain to paraffin. They promised to do it in a few hours, they finished it by the next day, but that's okay. After picking up the bike, I noticed a bad gear shift, turned back - they turned it up, but the shift was still with clicks and they did not switch to some gears. Also, closer to home, I noticed that the switch began to shake violently on any irregularities of the road. I tried to tweak something myself, I did it a little better than it was. But pereklyuk was still shaking. The chain itself, despite the fact that it was switched to supposedly pure paraffin, was dirty the next day, despite the fact that I was driving only home through the city. Apparently the chain was not degreased enough and dirt remained on it.
In the workshop, I was rudely told that these were my problems. And that in general it is the wear of the entire transmission. By the way, the mileage is 900 km, for a cassette and a switch, this is not a long distance. When asked to do at least a little better, the "master" twisted one bolt of the switch and made it even worse. You'll have to set it up yourself.
As a result, a boorish attitude and inability to even adjust the switch. I do not recommend coming here if you value your hardware