I am re-registering my igen4500.. When I initially registered it, I had not used it and could not give a review, but, now I can. I purchased this product to run my 40' fifth/wheel and it did the job. While it can't run both the 15,000 btu a/c's at the same time, it powered one while keeping everything else running including the fridge, lights, microwave,water etc. I bought the 4500 because of that capability. Those 2200/watt generators can't do that. Used it a solid month and ran it from 2-3 hours straight to 6-7 hours at a time, every day. The front information panel tells me everything. The amount of run time left, power output, fuel level, voltage and total run time. The a/c//microwave kicking on brings the noise level up a bit, but, when those are off it's very quiet. It got a little wet and muddy from some storms we went through, but it kept running and functioning without any problems. I have started it all 3 ways and it starts right up every time. I will mention your customer service because they were great. You can look up my my interaction with them. They were instrumental in my purchase and keeping this inv/gen. Taking it out for a month again in September. So far so good!
Just purchased so I can't comment on long-term reliability, but after adding oil and fuel the unit fired right up. It runs nice and smooth even with a load on it. Using for my 24ft travel trailer.