I spent a loooong time looking at different desks, not only at Thomann, but also IKEA and other places as well. I finally settled on this one, and I couldn't be happier. I'm a pretty tall guy (2m), and by not installing the keyboard rest, I have plenty of legroom. The height is good as well -- shorter people probably would also be happy with a normal-sized chair and sitting upright. I love the cable management features and the rack is very solidly built.
As other reviewers have noted, the edges of the desk can be a bit sharp. I use an extra-large gaming mousepad (80cm) to counter this, but I don't feel that the sharp edges are extreme or dangerous.
My only complaints are that on some parts of the desk, there is a small chip (maybe 5mm - 1cm in length, and 2mm in width) on the back edge, where I can see the wood instead of the white finish. This was there from the day that I unpacked the unit, so it was either banged around during shipping or it happened during manufacturing. However, the chip is quite small and doesn't bother me. Also, the desk could have been a bit more well-packed. Some of the extra screws fell out of the box during shipping, but fortunately, I didn't need them. For these reasons, I subtracted 1 star for "quality", but otherwise, for the features it's the best desk I've found and I'm very happy with it!