The ALICE pack attaches to the NICE frame in exactly the same way as it's attached to the standard frame. The frame slips into the rear sleeve on the pack, and the shoulder lift strap buckles exit the top opening, and buckle to the framesheet. Two side straps secure the pack to the frame at the bottom. The NICE frame has 2 horizontal and 2 vertical compression straps (I forgot to use the vertical straps in the pics below - the top compression strap buckles are hidden behind the pack). Shown below is a medium ALICE pack mounted on the NICE frame. The NICE frame basically gives the old ALICE pack (or any ALICE frame compatible pack) a state-of-the-art, modern, internal frame system. The flexible nature of the NICE frame should also eliminate broken/cracked ALICE frames for those users who don't baby their equipment.

For illustrative purposes, I strapped a box into the load carrier. Usage of the side wings is optional, but recommended when applicable. For narrower or flatter objects, the wings can be folded away and the side compression straps attached directly to buckles on the carrier. The two vertical compression straps can be crossed for added security/stability.

This is an inital review - I'll update it when I get a chance to load it up and do some workouts with it. Walking around briefly with a 35 lb load in the carrier gave me an inital feel for how well it rides. The belts ample padding doesn't get in the way when squatting or taking a knee. Shoulder straps feel very comfortable and are properly contoured. The weight feels like it's borne mostly by the center back pad and the hips, with the shoulder just adding stability.
This is a piece of quality, durable kit. Construction and materials are all top notch. For all you ALICE users, there's a new frame to consider.

6/19/04 - I've now spent more time using the NALICE frame and load carrier with 35-40 lbs in it. Love the load carrier - it holds the load securely with no shift at all (hell, it's got enough compression straps). I like being able to put the load higher or lower. Initially, I was afraid that the lumbar pad would be a source of a hot spot, but after using it for a while, it isn't. The airspace between the main frame and my lower back is noticeable. I'm still sweating all over, but there's less of a contact patch over my entire back. By loosening the shoulder straps slightly on downhills or level ground, and by just walking straighter instead of leaning forward, I can decrease the contact patch to just the upper back and shoulders and get a bit of relief. I get no shoulder ache or discomfort whatsoever.