I can not possibly recommend this company enough. Extremely durable, Crazy customization for comfort through straps or latches, and also very ergonomic. I never had the feeling of me needing to take the pack off because it wasn't comfortable or anything like that.
A little ode to High Sierra: I took this pack with me when I went over seas to the middle east (I'm not military, just a civilian) and did very many physical activities everyday, ranging from hikes going over 10mi, Swimming, Kayaking, Canoeing, Beaches, Camel riding, desert expeditions, and just late night street walking. I climbed a type of watch tower structure to get a better view with this pack on and I forgot I even had it on. I LOVE MY PACK! I take it to college with me everyday with my laptop inside of it, and take it with me on shifts as an EMT.
I don't have a single regret about purchasing my pack, and wouldn't have any changes or requests I would do differently. If you are in the States you can go to TJ Maxx, or a Marshalls and they sometimes have High Sierra there for the cheap. Right now they even have the US Freestyle skiing pack on sale for less than $50 shipped if you use the discount code "Save25" at check out.
I love the company and totally support them.