I've used a bunch of packs over the years and quit looking after buying Kifaru. If you do web searches you'll likely hardly find a bad review on Kifarus. What I really like about Kifaru are their overall weight, their capacity to haul small to super large, bulky loads, their adaptability for different uses, and their ability to take abuse. The only downside to Kifaru that I see is price. Similar to binos you get what you pay for and it is definitely worth the investment! I found my almost new Kifaru frame, packs, and accessories in classified section of this website and craigslist. If you have a tight budget (like me!) that may be an option.
Once you purchase a Kifaru frame you have the option of purchasing several different bags and accessories for your particular use. Personally I have an oversized bag (EMR 2) for hauling hefty, bulky loads and a 2nd bag with quick, quiet, and easy access to gear while hunting. I use the EMR 2 for hauling out meat/capes and on extended trips into the back country. I even use it for hauling decoys and equipment when turkey hunting. I have a Timberline 2 that I use when I need less gear and are in stealth mode. Kifaru has a large selection of bags from ultralight to oversized.
If I wouldn't have bought Kifaru I would have gotten Stone Glacier, Similar to Kifaru...SG have rave reviews. The one thing I didn't like about SG is they didn't come in camo...which was a deal breaker for me. I also liked the fact that Kifaru had so many different options for bags/accessories.