I've tried almost all of the Glocks and although they're nice guns they just never fit my hands well. I looked into the M&P compacts and they fit me just right. I ended up going with the 40 as I could have basically have two guns in one for only the cost of a barrel. Plus I wanted the larger caliber for EDC. I use the 9mm barrel when shooting along side my subgun so I don't have to sort brass. I actually prefer the 40 when shooting though. An Apex FSS trigger made it more to my liking. It's all about what works for each individual. Not having a thumb safety is taking some time to feel comfortable with though.