We have well over 200 hrs since June 2010 on the UK demonstrator P2006T, G-ZOOG, which is also available for training/hire through Airways Flying Club at Wycombe.
Both engines supply heat to the cabin though exhaust muffler heat exchangers (standard light aircraft system). It can be enhanced now for those in colder climes with electric heaters/fans.
At max weight ZOOG normally exceeds the 230FPM book figure for single engine climb - on either engine. No problem in a UK summer either.
In the cruise, a genuine 135kts IAS burns 38LPH total. So far it's been as good as gold, relaibel and easy to service.
Aeros at Gloucester took delivery of their first P2006T this week to be used for commercial training etc.