Got it on sale for an incredible price.  The only way I am likely to upgrade from this is if they come out with a 128g size.  64g is not necessary for my use, but at 128 I would be able to use it without worry of running out of space /and/ put my entire mp3 catalog on it as well.Update - about 4 months after I bought this and installed it in my Galaxy S2, it started causing some trouble for my phone.  At first I did not realize it was the micro sd card causing the problem, but it would occasionally have a status message saying something like "Unmount the SD card before removing it to avoid corrupting your data", and eventually it didn't even recognize that there was a card in there at all.  I put the old 1gb card back in and it works fine.  Put the 32gb card into the adapter, and put it into the computer's card reader... Nothing.  Wouldn't read it at all.I do back up my phone occasionally, maybe once a month, but lost everything; every photo and video I had taken of my new kitten since I got her because of this.  It is very surprising since Sandisk is usually quite reliable.  My wife has the same card in her phone, we got them around the same time, and hers is still working normally so far.YMMV, but always back up your data regularly (more than once a month) if you are taking a lot of pictures and video.