Honestly, when I first saw they were going to release this model I was overjoyed because the whole multiple grip frames, multiple triggers, multiple caliber conversions thing seemed to be a really neat feature. I mean being able to switch from a full size 45acp or 40S&W to a compact or subcompact 9mm for carry use really adds a lot of versatility. I have handled 2 different ones and the impression they gave me was it's a Sig Glock 19.
To me, it felt good in the hand, however this was with the mid-sized grip frame (which I believe all or most of them are shipping with) and personally I was a bit more interested in seeing how slim the thinnest grip frame is (I planned to get one for concealed carry). I have yet to see any of the other frames. The gun felt fine to me, and I honestly did notice a "cheap" feeling about the polymer. It felt like any other Glock, or XD I've handled. The one thing that did surprise me a bit was the DAO trigger. I'm the type of guy that prefers SA, or DA/SA but I really don't like double action all that much (at least not a heavy double action). I forget what weight the P250's trigger is but, IIRC I believe it is somewhere around 6-7lb pull. It was lighter than I expected and very easy to work with to the point where I would actually consider owning one. It wasn't a phenomenal trigger or anything, but it was a bit better than I expected. One thing though is IIRC, I believe the reset was almost all the way out which I find to be a negative factor. I wish it was more like a USP/P2000 DAO LEM trigger (I think that's what it's called) which resets after only ~6mm or so and is very easy to use.
I'm sorry I can't remember too much specifically about the P250 as it's been several weeks since I handled it. I'll say this much though, after doing a lot of thinking and considering a lot of different carry guns, I came to a realization that a 9mm Walther P99 was exactly what I was looking for and what I will hopefully be purchasing soon. I guess I hadn't considered it before but, Sig is attempting with the P250 what Walther did with the P99. I don't know about anyone else but, P99's feel a heck of a lot more ergonomic and much better in my hands than the P250, G19, M&P9, XD, or any other similar guns.