I have used Camelback products for years with no real issues. I use a lobo for most of my rides and do fine. I have a kidney issue so I have to stay hydrated well....water in the pack and some Gatorade in a bottle or 2 and I am good for long rides.
I agree with most of the posters here that don't like a hydration pack, but they sure beat not having enough water. I have used Camelbaks for years and they are good, but I got a Dakine a few years back and they are far superior. They are big, which I was very doubtful, but there's plenty of room to put stuff so the pack doesn't feel like a stuffed sausage on your back when they are full and the size seems to make them a lot more comfortable. The back is molded which helps distribute the weight and they have padded ridges that creates air channels to help keep your back cooler in the summer. Lot's of internal zippered compartments that are mesh so you can see through them without having to dig around to find stuff. Worth the time to check them out.