1) I have had a few issues with my leveling system, including popping sounds, and failure to retract. Of course these problems happen on a Sunday when no one is available to help. I have worked with hydraulic equipment for 30 years, and anytime there are big temperature differences, there is expansion or contraction of the hydraulic fluid. I attribute the popping sounds to the temperature change, and the metal expanding or contracting within the hydraulic cylinder and echoing off the frame rails. To me it isn't a big deal, nor a sign of a problem.
2) Getting stuck without being able to retract the landing gear IS a big deal though. Reading the Lippert manual to over ride the system isn't real clear, but a google search will get you a better picture and idea how to use an electric drill to run the motor. An easier way is to reverse the yellow and green wires on the solenoid mounted on the wall above the batteries. It also reverses the controls so that down is up/up is down. A new ECU was installed and fixed the problem.
3) While I am logged in: I required 2 more coax cables from my traveler satellite dish to my TV's so I could have PVR's. I removed the skylight in the bathroom, and found that I could drill a hole in the roof and fish the cables down the wall into the mechanical bay pretty easily. From there I just connected to wires already in place. 4 wires from factory would be a much better way, but had to work with what I had.
4) One other suggestion is to check all your outside seams to make sure that they were caulked properly. The factory had missed about 2 " on the front cap, and we had some rain get in, but we caught it before any damage occurred.
We have 60 nights in our coach since April, and other than these things it has been great.