I understand that most of the serviceability issues have been sorted. The expensive issue is due to gear boxes needing overhauled every every 500 hours.
Big writeup in October's
Flying Aviation News and Resources for Pilots | Flying Magazine magazine. The impression I get is that give it a year and the various options (there are a couple out there) will mature enough to be no-brainers but they aren't quite there yet - so you will still be in the "early adopter" camp if you go that route, with the risks that it entails.
When the gear box TBO has increased to something sensible, with AVGAS 100LL probably not going to be around for ever, the increased fuel efficiency and the lower specific gravity (fuel weighs less) they have the potential to be no-brainers in the future. Not quite sure we are there yet, so you will need to do lots of research and take a small risk.