Personally I'm a fan of them. For me it's about size, with my body style (same goes for my wife) I just haven't been able to comfortably conceal a larger semi-auto that well. And not carrying isn't an option so I'll trade off some capacity for that.
I DO make sure to carry at least one extra mag on me though. Will usually keep the compact mag in the gun (to keep size down), and then carry a larger/extended mag weak side.
Currently own a Kahr CW9 and Walther PPS. Both have been flawless for me. Each have some small differences that mainly just depend on someone's individual preferences but both can be carried easily all day and still be fun to take to the range.