I picked up a Q5 and started shooting it in November. I am mainly a production shooter but set mine up initially for carry optics and then recently switched it back over to iron sights and have gone back to production in preparation for Area 1 which is in May this year.
For production (over the years) I started with a Glock 34, then transitioned to the CZ's (SP-01, Shadow, Accu-Shadow), moved on to the Tanfo's (Stock III, Stock II) and now am planning to run the Q5 thru the 2018 season.
The trigger has been well advertised as one of the best out of the box striker fired and I have to agree. I went from a Stock II (with a Bolo setup) to the Q5 and really like the feel of the trigger. It will definitely not hold anyone back. From my side I am still getting used to the different trigger and working on my reset/prep but feel once I get dialed in with this gun I'll shoot it as well if not better than my Stock II.
For accuracy out of the box I have been pleasantly surprised. I am using 147 gr Leatherhead bullets over 3.2 grains of TG loaded at an OAL of 1.15 and this combination is every bit as accurate as any of my Stock II's. Stayed after today's USPSA match to practice a little as the sun came out and at 25 yards was shooting the plate rack 1 for 1 and at that same distance shot a 10 round group off hand into a USPSA head with little difficulty. The gun will shoot as long as I do my part.
I did find with the factory recoil spring setup the gun was over-sprung for me. From this I went to a fixed guide rod with the Wilson 13lb flat wire recoil spring and the setup works very well for me. I have also changed out the fiber front sight to a thinner fiber front sight, added grip tape and am using the TTI +3 base pads (for production). Pretty minor changes compared to what I did to my Stock II's to get them where I wanted them.
The one thing I do wish is the rear sight arrangement had a little deeper and slightly wider notch to allow in a little more daylight for ease of picking up the sights during the draw and transitions. This is not a deal breaker by any means but just one thing that I feel could be improved.
The grip size is a little small (reason I am using the TT1 +3 base pads) as I have medium size hands so I can see this being an issue for someone with large hands. As I am a LH shooter I active the magazine release with my trigger finger. I am still getting used to this but again not a big issue. The mag release button is large and for RH shooters I would think they would find it easy to activate.
I feel for the money the Q5 is a great value.