What sort of system are you talking about - chilled water or individual units for cabins? Also what size? Marine Air are generally very good on the reliability front. The largest system I've ever installed of theirs was 45000 BTU split between 3 compressors with VFDs all round and from what I hear there's been no problems since.
Ah, hoped you weren't going to say that. To be fair the experience I have with that size is limited to Heinen and Hopmann and unfortunately in all three instance it was the networking that caused the problem - mechanically/electrically all good but communications had their issues. But of course thats a different make.
Can't help thinking that the details are scarce because they're still designing it - not that I'm cynical of course.