Hi,

I've used the Front Roller Pluses and Backroller Classics. I'm very happy with them.

Don't leave sharp objects loose in them. If you do, and discover independently why you shouldn't, then McNett SeamGrip does a wonderful job sealing them up again (at least, it works on the Classics).

I use them everyday, commuting.

Also, you can put a second set of hooks on the rails (on the Backrollers at least, it fits). This might be useful if you're carrying heavy things or riding on rough surfaces. Not that I've heard of them breaking...