I am a sound engineer based in Romania and specialize in live sound and live recording. I am pairing my X32 Rack with a Midas DL151. I was looking for a very portable setup that is very adaptable and works on multiple platforms.
I have been working with the X32 full model and, respectively the M32r; however found myself most of the times not being able to fit the gear at the venue or at least getting in the way; I do miss the faders and encoders but managed to link a small midi controller to my laptop and not looked back ever since.
The sound of the on-board preamps reflects the price of the unit, that being said they are not bad at all. I recommend pairing it with a Midas stagebox after getting acquainted with the system. The routing is very flexible, anything can go anywhere and with a bit of fiddling you can get quite a bit out of it. The processing sounds fine indeed, but be careful if you don't have experience, it is easy to overdo compression and eq's; the end result will be harsh (some other people tried my gear).
One last thing that I'll add - the pairing between the mixer and PA you use needs a bit of tweaking since the summed outputs will sound radically different at some levels depending on the material reproduced.
I highly recommend it!