Never heard of them!
Optimistic? Yeah! under £200 for something that would normally cost up to and over ten times that for 200BHp?
RS Tuning in Leeds (its a trek, but they're well thought of on here and also MeganeSport).
There is Viezu in Bromsgrove...but we've only used them as Rolling Road, not had maps done from them!
Take it to Dave Dreads and he can do the DKU (Dog Kennel Upgrade)...it gave him a few brake increase over other 172s at the last RR day!