Everything want great. From the salesman explaining everything, to my multiple changes to the system, to installation, to operation. After six bids from other solar companies (Solar City being the highest), 21st Cent was the lowest. Our BGE bills this year have all be less than $100.00. I’m used to $400 bills. I watch the generation of electricity every day through the internet. Also fun to show my neighbors that my meter runs backwards. I’m 200 kWh credit so far this summer.