I think they're outstanding guns. A P239 SAS is on my "to-do" list. For my own tastes, the SAS frame and SRT trigger are must haves on this gun.
The only drawback is that you get subcompact capacity in a very medium-framed compact gun. But the good news is that it'll handle as well as a full frame for most folks.
It is a slim gun, just don't expect subcomp portability.