We have a 2006 9.5 Apex and have used it a lot over the last 10 years. The only real complaints I have is both grey and black water electric valves have failed as in dead.
3 years ago I replaced them with a different kind of electric sewer valves and relocated the switches in the generator storage compartment. The manual over rides on the original valves were a joke being an aluminum slot for a screw driver that stripped out first try?
Redoing the valves was a job as there is very limited clearance in the basement. I replaced the valves with 3"Auto-Drain with 3" Valterra blade valves. These have worked perfect for the last 3 years now. If I ever have to do an over ride all I have to do is remove the kick plate, reach in and pull the handle on the blade valve.