I am using the ally aero pack as part of my setup for the European Divide Trail in June. I have just ridden the Dirty Reiver and used it to test the alloy aeropack. A long day of climbing and descending some pretty hardcore gravel and stone. I saw several others doing the same. It passed with flying colours: secure, no rattle, squeak, flapping or banging, light weight and bomb proof. Even came through a fairly hefty (and embarrassing!) crash unscathed.
I like the design. I went with this type since I don't like the seat pack bags. This design holds the bag tight and doesn't shift. I bought the aluminum aero pack, with brazeons. Really wish the carbon had this as an option. For bikepacking the skewer mount and quick release frame mounts look fragile and maybe prone to damage if laying the bike down. I chose the frame mount adaptors with the quick release, which is a nice design feature. IMHO the only concern I have are the 5mm attachment points, which I assume are the "standard" don' t offer much strength. I altered the attachment mounts to accept 6mm allen bolts since that's what was available on the Salsa Fargo frame.
I really like the design and the shape is aesthetically pleasing and sure beats the other pannier frames. It's nice the be able to remove without tools. The brazeons on the frame allow nice additional options if need be.
I have had my AeroPack for a while now and I am a big fan, recommending it to everyone who will listen. It is the perfect ‘pack and forget’ item. I love the fact that it can easily (within seconds) be attached to any of my bikes, whether it be my daily commute, gravel, road, or long adventure. I don’t have to think about what to take or how to fit it, I know that the AeroPack will do the job.