When I was picking out my current EDC gun I shot most of the popular 40s on the market, including the Sig P250. At first glance I really liked the gun. It had good ergonomics, good looks, and it was a Sig. However, unlike most Sigs, the 250s use a long DAO trigger. During slow firing exercises the long hammer (a piece of stamped and rolled plate steel) creeps back slowly toward you without any real indication of when the gun is going to fire. It was actually a little unsettling because the extra long trigger pull made it difficult to predict when the gun was going to go bang. I also didn't care for the exposed stainless rails that were visible from the back of an otherwise all black gun. It just felt like a much cheaper alternative to a 229, which - I suppose - is basically what it is.
For me, the DAO trigger was an absolute deal breaker. Had the P250 had a standard DA/SA trigger like the 229, I probably would have one instead of my XD.
I think that the P250's trigger is something that anybody looking at the gun needs to consider.