I bought the kit from RayWay and completed his pack. The instructions are first rate. He gives you just enough materials to complete the project with very little waste.
Since making the ray way pack, I've applied what I learned to make a series of other types of packs. I've made a G6 type silnylon pack (2000 cu in) that weighs in at about 6 oz and a spin cloth version of the ray way pack that weighs in at about 5.
The ray-way pack is hard to beat, however. After making several packs I've given all of them away accept my RayWay pack, my Granite Gear Nimbus Lattitude, and my Golite daypack.
Since they did away with the masters kit on the jardine website I've been shopping for materials instead of buying a whole kit. After making a few varients, I've got some ideas on a final pack design.
I would agree with one of the previous posts, however. The Fanatic Fringe packs look really good for the same type of money.