azslow3
2) the quality and reliability of the unit itself. Does it disconnects periodically? Does it change fader position on its own and how precise these faders are? Also buttons, encoders, display and jogger quality, material and feel. That is something only Behringer can fix in case there are some problems.
Just a little comment on this question:
After three months using mine, the quality and reliability seems fine. It has never disconnected. The faders have not moved on their own, except of course when initializing a project. I rather like having that visual and audible snap-to. I use the sliders and the transport buttons and the jog wheel primarily, so I have no comment on all the rest of the buttons except I hope someone comes out with a nice vinyl colored template. The rotary encoders I haven't needed to use, except for panning which worked fine.
I am coming from a Tascam FW-1884, a solid unit I would still be using were it not for their drivers. The quality of this Behringer seems comparable. The faders are also 100 mm and seem to be as accurate as the Tascam's. I too had a very poor experience with an early mixer from Behringer (background hiss, scratchy faders), so I am pleased the quality control has improved for the X-Touch.