"Great suspension for under 30 lbs and the lightweight fabric is surprisingly tough. The top loader has a roll top which is ideal in the southwestern USA as I rarely need raingear. There is a space between the packbag and the suspension for a water bladder that is accessible from outside the pack, plus a hydration pocket inside the pack that I use for an iPod.
Only real problem with this top loading pack is loading via the roll top. It takes a while because of all the fabric. I overloaded the suspension by bringing a 6-pack plus on a week long trip but that's a lot of weight for any lightweight backpack."