I bought mine used off a friend / OSA member and have run it for years without issues. I like it more than the single stack Glock in 9 (closely resembles) as it is less snappy and feels more stramlined for carry. The trigger is not the best as it is long and heavy but it fits the CCW niche well. It was cheaper than, and better than the other single stack 9’s i tried (Glock, KelTech, Ruger, XD,) and runs flawless to boot. Ive not shot a shield for comparison, but don’t feel the need to as the Nano does the same thing but is smaller. Just my .02
I got one recently in a trade with a fellow OSA member. I didn't expect to like it, but I have been very pleasantly surprised. Even with a long trigger, I like the way it shoots. Very easy to carry.