One thing I did not like about the Solo Carry is the VERY slim thumb safety. I'm a 1911 guy; carry cocked and locked with confidence, and instinctively release the thumb safety when I draw. But I handled a Solo three weeks back and IMHO, during a panicked draw it will be easy to choke on the Solo's thumb safety - even with a lot of practice. Darn thing is too narrow... for my taste, anyway. YMMV
Of course, the Solo can be carried with the safety off, as the trigger pull is about 7 lb.; but if a gun is manufactured to be carried with the safety on, I personally would not carry it otherwise. Just my $.02 - others, I'm sure, will disagree.