I bought an ETEC 90 last june, so far it has lived up to all the hype. Great fuel economy, VERY VERY quiet, and is very quick out of the hole. I've got it mounted on a 16 ft cajun bass boat. The only problem has been propping it. so far i've used a 13 3/4 x 17 S.S., a 13 1/4 x 17 al and neither has given the performance i want. i'm gonna try a 4 blade aluminum next. Only got to run a partial season so i'll let ya know the outcome.