I wouldn't recommand checking in a luggage either. One of my brand new luggage (non-LV, thank goodness) zipper ripped right off on it's very first flight. I think it go caught on a conveyer belt or something. They are incredibly rough with throwing those luggages because they have to work fast.
Keepall is great, but the only flaw is that it does get heavy and even with the strap its tough on the back to carry -it just digs into the shoulder.
Had to add: The new Eole is great too! For the smaller size you can check it in and it rolls!