For the money, this rack is superb. I've had mine for nearly three years now and it still does the job.
I've recently had to replace the two boom arms, as through ware and tear they've started to become loose and tend to drop the cymbals mid crash if you're not careful, but using the Mapex 6705-075A Adapter, you can use any standard 22mm diameter boom arm as a replacement.
I also had a problem from day one with one of the plastic end caps for the curved horizontal bar. This wasn't formed properly in the factory, and subsequently keeps falling out, and no amount of masking tape or super glue seems to stop this. If I could get a spare that would be great Thomann!