Hey Crusty--I attended Cornell, which isn't the same as living in Ithaca, per se.
But it is a beautiful community with a lot of cool amenities, depending on what you're into. You are right in the heart of the Cayuga wine trail with two lakes [Cayuga and Senaca]. Ithaca is great in the summer, and the surrounding areas to both campuses are very, very nice. Very safe community, etc.
But one thing I'd like to point out is that Ithaca is VERY isolated. It is a tough place to get to [and get out of] due to a lack of any connective highway infrastructure. Used to take me an hour doorway-to-doorway to get back to Syracuse, basically due to the fact that I had to drive for 30 minutes to get to route 81.
I'd also think long and hard about the social scene in Ithaca--obviously, it is a college town, with two large institutions fueling the local economy. But that probably isn't the scene you're looking for as an adult. I wouldn't say that the downtown is "happening" [per your earlier post]--the Commons are kind of weird--cool place to visit, if you get my drift. Lots of nice restaurants, though, many of which are outside of downtown Ithaca.
I don't mean for this to discourage you in any way. I'd just suggest that you visit and know what you're getting into before you decide whether Ithaca is for you. I had the opportunity to go back there for grad school, and being immersed back in that isolated, semi-insular community was one of the factors I weighed [considering that I'd already experienced it as an undergrad].
Beautiful, safe place to live--no question. And I'm quite nostalgic about Ithaca these days [more so than I was as a Cornellian]. It is a cool place, just not for everybody.