I work on them, and fly on them, and I think they are pretty good. Over engineered? Yes, but that's a nice thing when things go wrong, and you've got lots of backups. The hydraulic lines are crappy, but thats because the majority are aluminium, not stainless. Even dehav admits that was kinda dumb. The 400 is all stainless lines. The PSEU, (proximity sensor electronics unit), originally controlled gear sequence, but was modified years ago due to problems. Now it only provides position indication for the gear and all doors. Overall, a good a/c, and one that I'm comfortable flying in, in bad weather and mountainous country.