I'm hoping ULPower proves to be just as reliable as the Rotax. At around 180 lbs wet for 130 ponies, being fuel injected and just a grand or so more than the 912, I would prefer to go with ULPower's 350iS.
Enjoy your UL 350 - I'm hoping it works out for you. They are a good looking engine. Expensive though if it does not pan out.

You mention reliability in relation to Rotax. ULPower would have to sell 10,000 engines a year for 10 years to come close to the proven in-service hours Rotax has accumulated already. You're giving them an unattainable goal. The old argument about Rotax's high rpm's being a concern has long since been proven a non-factor.