I was wondering the same thing. I've been using Cabelas brand bladders and Camelbak as well the last 10 years. I think it is time for an upgrade.
This weekend I looked at the Platypus "Big Zip" bladder. I think I will go with this bladder for a couple reasons. #1, the upper end of the bladder zips completely open which will making cleaning it a breeze. This feature is very appealing due to that fact that cleaning has always been a pain in the past. #2, I've been told that they are very durable as well.
Anyone else have any experience with the Platypus Big Zip?
Just another thing to mention, i use my bladders alot. Of 3 platy bladders iv owned in the last couple years (none of them were the big zip), only one is still working(small tears from stress, they puncture really easily). The dromlite is going to definetly be the more durable of the 2, its going to cost a bit more though. You probably wont be dissappointed with either, until you feel that water dripping down your back like i did