Quoting CutlassJim:
While I believe Tial makes a great product after trying out some Synapse Engineering products on friends/customers vehicles I'll never go back to a diaphragm design. I'll be replacing my modded stock BOV for their unit on my current build. Very good write up though.
I have a synapse WG and BOV, They seem to do the job pretty well. Even tho they say that you don't need a MBC for the wastegate I still have the lower shore mbc on it and it holds boost very well. BOV has a quick reaction IMO.