The directions on how to get this running were very easy to follow EXCEPT the directions regarding putting in the oil. The oil supplied is exactly the correct amount, yet the directions warn you about over-filling the oil tank. There's also a nifty oil filler spout not mentioned in the directions, which made filling easy once I realized that to use it you need to tilt the inverter at a 45 degree angle with the spout now standing straight up to get the oil to flow down.
After that, the inverter generator was as easy as fill-switch on the fuel-switch on the unit-press the start button. The starting process is awesome, and doesn't require you to hold the switch at all. Likewise, the shut down procedure is as simple as pressing the on/off button again. There's even a wireless fob to control it. For usability, this cannot be matched!
I bought this generator to power my 44ft toy hauler. I opted out of the onboard generator because I’ve read these happen to be quieter and more fuel efficient. This generator powers almost everything we need and runs for hours on a single tank. If you have a 50 amp trailer you may not be able to run both a/c but besides that, this generator is perfect.