I assume the Beetle has the same 1.8T as the Golf so it should be compatible. If not you can run it on your GTI
You connect it to the stock MAP and boost sensor. Control is via Dinan D-Sport app. All it does is increase boost pressure +2 +3 +4 for Sport, Sport+ and Race. MAP sensor was super easy, boost sensor took longer since I had to jack it up and the clip was hard to get off (had to use a pick to pull up the locking tab).
App has a couple vehicles to select from; I assume the only difference is the hardware plugs and voltage for the different make/models. Use "Audi/VW VGA". Selecting different mode is easy, just select and it'll light up. There is a "Boost" reader but Im not sure if it automatically returns it to "Stock" PSI. You would assume that your setting would stay lit but it does not. TBH I never really bothered testing.
Worth it? At this price yes. "Race" recommends 93+ octane if you have access. Definitely noticeable.