I have the standard vest, but I just bought an Orvis Micro pack. The vest has some odd sized pockets that quite honestly weren't good for anything, and other pockets were too big for most items. I must say the Orvis Micro pack is PERFECT. I can carry everything I had in the vest easily in the pack. I am surprised the small size could fit all my dodo in. When it turns cold, I will probably go back to the vest for additional heating. For the Summer, the pack rules!
I agree with the above post. You almost have to try these things on. I wanted to love the Fish Ponds, but all of them had something I didn't like about them. They appear well made, but it also made me try these things on for fit.