Personally, I would wait for the official Verizon Version that's allegedly coming out in the next couple weeks...we'll see. Then you can download it directly to your phone, I believe, from the Verizon website...
Yeah I took my fiancees Voyager in to the Verizon store for a software upgrade and they fragged the phone, I got a new Voyager sent to me because they screwed up the phone. I think I will wait for the official release of the 4.5 OS for my Curve just in case.