I have a few of them, a 128MB, a 256Mb and a 1Gig. The 128mb typically moves small files around my household. The 256MB is currently my workhorse which I take to computer repairs. The 1 Gigger I havent really had a chance to use. I love them all though.
When buying larger ones such as 2Giggers, watch out for fake ones. Some are 64mb jump drives which are rebranded as larger amounts. They even trick your computer to think that they are the larger size. However you can only ever store 64mb on it (for obvious reasons). Avoid places like Ebay when purchasing them.