I just got mine yesterday, here's what I think. I got mine for $135, I'm not happy about it costing so much, but I need the memory. It's an authentic Sandisk card, none of the fake relabeled 2gb ones that people have been scammed with. Music takes awhile to copy. A cd about 10-20 seconds, which isn't bad itself, but when you copy 30gb of music at once it takes awhile. The card works in the phone, but it takes about 9 minutes to scan my card for media files. I don't have to do this often, but if I add or remove files it needs to scan to update, which is kinda a hassle. The default music player on the Vibrant doesn't work for me. After the media scanner finally completes the default app says "not enough space in music database". I use btunes, a better music application, and it works fine for me. I can view and play the music much better than the default app does, the only issue being the need to scan the card for new music With a good music app like btunes it's good to have the extra memory, but beware it takes awhile to scan the card.