I have it and a few other midway bags. Good stuff for the money but definitely wait and get it on sale. 150 bucks is a little much. Mine carries my rifle and kit up and down a bunch of rugged hills every month during my monthly long range match. It's also been with me to literally hundreds of BLM spots. The backpack straps are reasonably comfy and sit at the right spot to keep you from banging the back of your knees on the bag. It's a little heavy, like 4-5lbs feels like. The exterior pockets are cavernous and fit my magnetospeed and 100 rounds of rifle ammo plus snacks, drinks, and little things.
The shooting mat is nice. Lightly padded, keeps the belly off the dirt.
Here's a pic of mine with my coach's 6xc Savage and my .223 Mossberg MVP sitting on top for scale. https://ballisticxlr.files.wordpress.com/2017/01/img_1114.jpg
The reason for waiting till it's on sale... there's enough little things that you'll feel a lot better about it being on sale than paying full price.
Now that I've answered your actual question: Eberlestock dude. Eberlestock. http://www.eberlestock.com/store/lodrag-pack That's the shiznit and worth every penny. I'd way rather have that and keep a rollup mat inside it than own the midway bag, looking back anyway.