Summary: I bought the 650t as an upgrade from a failing 60csx. Even though I was happy for several years with the performance of the 60csx it started shutting off on its own with just the slightest of jarring. I was excited to get a touch screen, more waypoints, bigger screen and a camera. None of these features are worth it because of the following reasons: Normal use drains the rechargeable battery in one day, if you use the anemic camera it will last less than that.
Pros: Large Screen, Quick Signal, Reliable Reception
Cons: Buggy Software, Short Battery Life, Unreliable