I've got one and had to return it to Sig twice due to light / non-existent primer strikes. Google up "P290 Light Primer Strike" and you'll find pages of hits. I finally narrowed it down to an ammo related problem and carry mine for a back-up, but I doubt if I would ever consider it for a primary SD weapon.
Sig was no help, they denied any problems with the weapon. After I told them there were pages of hits on the internet with folks having the same problem, their comment was "Well it isn't epidemic, just a few people having problems".