I have not been able to use it yet because the hurricane passed me by but I hooked up some things with it and it was very nice
I love my Yeti 400. The key is to understand it's capabilities and limitations. I use it to charge USB and AC devices (phone, laptop, etc) when I'm traveling in my camper. The AC inverter is strong enough for fans, lights, CPAP, smaller power draw appliances. Helpful to have a solar panel or car charger in order to keep the battery topped off. Highly recommended. IF you need a stronger inverter for bigger appliances try the bigger Yeti models with stronger inverters.