DISLIKE:
On iPad Pro 12 incher or smaller iPad pro, the touch sliders are too sensitive, my sound tech complained that just barely touching them caused them to jump dB.
Also, when adjusting two faders which are not bridged together (guitar Left and Guitar Right), had issues moving both simultaneously - one would stop and the other would keep going.
And a worse problem - the drummer's iPhone was supposedly not given access to the main aux, but when he connected, he could see the faders on main, they were ghosted - and yep, he was able to adjust the main R+L and caused crazy loud feedback through the mains that took a second to realize what was going on.
Verified this on another device too...