the EMB - not perfect either. I swear our's talk to each other, so when one is having APU problems, the others join in. Same with Lav timers. Usually it occurs when there's a full moon. The only other gripe is the Pratt 118B engine takes pretty good weight hits above 4000 feet in the summer (usually above 16 degrees C). It would be nice to get an STC for a 2000+ SHP engine to alleviate this, however the weight gained from the engine would probably decrease the payload anyway.