I have a friend in Florida who purchased a q20 when they first came out and she loves it. She previously had an APQS George and had lots of trouble. The area rep had no clue about this machine so she was in the phone many times with one of the owners. She sold it and purchased the Bernina q20 and has had no problems whatsoever.
Whichever one of the mid-arm machines someone wants, I suggest they visit dealers, ask tons of questions and try it out more than a few minutes. Make sure it fits how you sit, how you sew, etc. I definitely would choose the q20 if I was to buy one, and I’m not a Bernina or nothing person even though I own 2 sewing machines - I also own a wonderful Babylock and an .older but super Viking, And all those vintage Singers!!!
Sandy in Mooresville, NC