Inverter microwaves true usefulness?

Based on everything I've read, inverter micros are only really useful for people who use the lower power levels. I brought a large 2.2 inverter micro and now on the fence about replacing it with a smaller non-inverter unit. The 2.2 fits the space its in, but I'm bothered by its enormous size. My family is indifferent about it though. I did get a good price on it @ $130. I suppose my real question is, is there a real reason to keep it?

The only things that actually get defrosted here are bags of chicken wings/drum sticks and ground beef. My old non-inverter micro did this without cooking edges either. I will admit that I just used the inverter type to cook a frozen meal and the food at the edges of the tray were not burnt.