I've been running the ots maps from MHD/wedge for stage 1/1+ for the past few years. Massive difference in performance and definitely worthwhile. Butt dyno would guess the claims by MHD are within the ballpark.
You'll heatsoak the intercooler a little bit when pushing it on the road but it's fine otherwise. Personally ild flash the tune then upgrade the intercooler as you realise where the limits of the stock system are. Ild definitely change it if you plan on track use.
The exhaust burbles are fine and sound alright but personally wouldn't run them unless it was a weekend only vehicle. Could be a complete coincidence but I had to replace an oxygen sensor a few thousand kms after having it on medium. It feels like they're not great for the life of them but that's just my personal experience.
