I have a Dainese pressure suit and a Leatt brace and they "can" be made to work together. Yes it is a slight hassle, but so was wearing a helmet and gloves
back in the day!The back part of the Leatt I slide under the spine protector but above the netting and the front zipper only does up about 2/3rds of the way. I'm looking at stitching on a small velcro tab at the 2/3rds position to keep the zip in that possie, until Dainese releases the Leatt compatible version - and I can afford the trade up!
I've tried the Alpine Stars brace, but hated the feel of it (hard, scratchy foam around the neck opening).
Basically, the longer your neck, the more comfy the brace feels - "front row" types probably need to look at something else, but then again, they don't have a neck anyway!