I have a refurb......... no major issues. One thing to look for though.......... I got my first one 4 days ago, worked fine, but after being on for a little bit the battery went completely dead after being on standby for 30 min. yeah, something was wrong with the battery, on top of that it would randomly exit me out of screens.
turned out they sent me one that had NOT been fixed yet, their boo boo. They sent me out a new one and I got it today. This one looked brand new, all the stickers from samsung still on it and everything. Let it charge and turned it on....... no more issues.
It lags a little and the battery life REALLY sux, but those are issues with brand new ones also. I turned on my task killer and put the security level to low so that I could kill everything but non essential apps. Now the battery life seems MUCH better. It seems like this phone takes a long time to charge as well though. I think i wll just allow the battery to fully drain then plug it in, see if that will work, maber get rid of any potential battery memory.