I just bought my whole family packs. 3 f1s and an m1. I've already packed out a large deer, on mine and love it, it did great. I got the vapor and backings, it's so versatile it literally does anything you want and will handle loads heavier than you want to carry.
We did have 2 water bladders come to us with leaks and the shoulder straps on the m1 had small pokey pcs of fabric that irritated your neck when wearing. I called them and they never even blinked, they're sending new bladders and shoulder straps as soon as I email customer service.

This is a great American company to deal with. I'll be buying more products from them in the near future. You can't go wrong with them.

This frame is perfect for the 2500 vapor and the 5000. I use my 2500 on this frame mostly. I’ve used it from everything to a trip out to the food plot to a day at the beach. It’s my go to on a daily combo.

The M1 is as comfortable and shooter-friendly as promised. Stellar load carrier. Coupled with the Vapor 5000 it'll get a monster workout this fall in the Caribou Targhee. The EMOD system is as well designed as it is executed. Thanks Eberlestock. Sandmann

Great design. I use it for rucksack training with a 45 pound ruck weight plate while trail blazing. The comfort is unmatched. And the versatility is even more so unmatched. Cannot wait to pack out a quartered-out elk with this thing... As minimalist hunter, I have simply strapped the H7 Dagger to the face and I am carrying all that I need for a long day in the field. Thanks Eberlestock.

At 6'2", this carrier is too short to fit me even at full adjustment. Normally, I run 20.5 torso. Hope they make a tall version of this some day...

Good news is that I returned the pack (meticulously cared for while I did fitting) and received a full refund.