No draw backs? Everything has some pros and cons. I just read previous posts and see a few complaints. Doors come open on the road. Need to strap them shut. Not a big thing but just something to be aware of. Most RVs with residentials have a larger battery bank and inverter to power it while not plugged into shore power. If you boone dock a lot I wouldn't suggest one. Open the door and read the power requirements. Then check to see if the RV supplies those electrical requirements from the battery bank. If you are driving from RV park to RV park probably not a problem. Just don't take the salesmans word. Do the calculations. Salesman told me that the extra battery bank would run it for a week off the grid. :B Total BS. Actually could run it for about 8 hours if running nothing else. Some friends have one and they added a self starter on the generator when the battery bank reached a low level. Excellent idea.