I'm kinda torn. I've come to love the size, the screen and the overall hardware. The phone does absolutely everything I want it to do and more - it's superior to my previous iPhone in almost every conceivable way. On the other hand, the abysmal support from Samsung/Verizon is troubling, and the weak antenae/signal strength is really annoying.
We recently picked up a referb for my wife, mainly because I knew I could load it up with 2.2 and had all the tools handy - Odin, Clockwork, a multitude of roms, etc. And also, there still isn't anything that tops it right now - I refuse to pay for a 4G phone and higher rates for 4G service when there's no 4G coverage anywhere I'm likely to be.
But when it comes time to replace these, I have to say the likelihood I'd replace it with another Samsung phone is currently hovering right around zero percent. Even if the hardware is great and I'm able to run the latest version of Android, I'd have a hard time rewarding a company who's demonstrated such lousy official support with my repeat business.