I have one too on a ribquest 6.3. Good on fuel, true. Quite, true. Reliable, i have had a broke down after 65hours due to a broken low pressure gasoline pump. Repaired under warranty in Belgium, so no big deal. Since then no problems any more and now 300hours on the clock!!! Flying, not really behind a 6.3 m rib of that really UK quality built rib, should do a good job on a 5m rib though!!!
so in general a good engine. Always look what you really like to do the engine for you: speed, cruising economically, hole shot,....then decide.....