I've been using one of their tachometers for over a year. Stuck it on with a small piece of 3 M body tape. Works fine. Battery still going.
Unlike some of you guys, a selling point for me was that my LIKE200i IS Air Cooled.~~~¡!.....no coolant leaks, etc.,etc. to worry about. VWs were a/c for a bazillion miles and years....all over the globe....for the same reason as my thinking, so wasn't worried. Keep fresh, good quality oil and oil level....and good grade of gas, valves looked after, correct spark plug....and no worries!
Stig