I have that very desk, with the additional MIDI option, which I have never used. I like it, but I can't really compare it to D&R or TASCAM, since I've never used them. I do have problems with the gain structure sometimes though. with hiss coming through, but I am sure the problem lies with me more than the desk. Also, the caps on my power supply leaked and I had to replace them.
In the end, I think I will sell mine though, as it is really big and heavy, and I do not wish to move house with it any longer. And I don"t record through it