The UR22 has been a very dark horse. The mk1 got a very good rep' when it was reviewed in Sound on Sound with a special mention about the very clean mic amps*. Since that time nothing bad about the AI has come to my attention and in the AI world, No News is definitely Good News!
Steinberg have since gone on to improve the unit (TBFair so have F'rite but then the 2i2 NEEDED fixing! As you say, no MIDI and that lack is I think the height of beancounting meanness. )
I keep looking at S/H shops for UR22 to try one out. Bit if a hobby of mine! Had a US 122, US144, Ally' i02 and F'rite 8i6 from my local Cash Gennies. Saw an Akai EIE a few weeks ago and would LURVE to try one but car and roof have set me back £1500 recently so could not justify the ton!
*I would take any and all comment about AI mic pres with a large dose of NaCl VERY few people here are able to make objective tests (or if they are they never fekkin; do!) MOST pres on MOST AIs are very good, even the sub 80 quid Alesis i02 is very usable. A Coles ribbon at 3 mtrs from a spinnet would be a challenge for most but then WHO has a quiet enough room?
Dave.