I bought the Allen & Heath Qu-pac mixer to replace an older analog mixer for studio use and my one man band performances. I wanted a smaller foot print for my set up, so I only looked at rack mount mixers. I am very happy with the mixer.
The operation is very intuitive. There are many input possibilities and routing choices and the channel strip is wonderful. The effects are just perfect for me. I connect to my computer via usb to stream backing tracks and this works flawlessly. I use the 16 analog inputs for mics, piano, synth's, guest guitars... and the inputs 17-32 are used for inputs from the computer. Endless possibilities compared to my old analog mixer. I have used the stereo mini plug on the front to play music from a phone, and a usb disk plugged in to the computer comes into channels 31 and 32. Every input and output have processing possibilities like eq, gate, compressor, sends.... wonderful. The sound is very clear and consistent on all channels.
Mixing live is a little slow without faders, but it works and takes up such a small space. I have not hooked up a wireless router and an ipad, I can see that would speed up all mixer operations.
I highly recommend this mixer.