Well, we have no complaints with ours. Availability/serviceability is up in the high 90%s. Spares via McAlpines/EC have never really been a problem. I can't really recall us being gounded for more than a day or two on possibly two occasions over 5 years. Servicing costs are getting cheaper as servicings are now only every 400/800 hours, apart from a few 100hr checks, and EC are looking at doing away with the 400.