I got one of a those couple of summer ago -- it's great. I bring it with me on most rides now. The only time I leave it home is on organized rides with SAG support, and even then sometimes I bring it along. It's very light and it fit nicely in my old handlebar bag. Since retiring the handlebar bag last year, I usually attach it to the bottom of my seat wedge by sliding it in the elastic band that is part of the bag, although I had to add an additional elastic band around it to keep it from falling out when I hit a big bump. (It fits easily in a jersey pocket too, I just don't like having stuff in my jersey pocket.)