I had a really nice rack over the back wheel and a nice luggage thing that snapped off and on it in seconds, designed to be perfect for commuting. However, I found that I just prefer a backpack, and I sold the luggage stuff. Anything you attach to your bike that weighs more than a couple of pounds will affect the handling somewhat, and I just didn't like how it made the bike more sluggish when I lean around corners. I guess it's a personal preference.