<- This guy.
My main complaint with the 225 was GPS accuracy. It just didn't work for me on PNW trails. I'm hopeful that the addition of GLONASS improves the 235's accuracy, and it is my understanding that this is often the case for those of us in the North.
But even without the GPS issue, I probably would have returned the 225 in favor of the 235. It's a joke how much richer the feature-set is on the 235 with the Connect IQ, larger / four-field display, multi-mode, and scores of other improvements. And all of this after a four month 225 life cycle? Ridiculous, even by Garmin's standards.