Generally I'm pleased with the cleaning but they always seem to miss the desk in our bedroom. The top is dusted but all the little ledges around the drawers and bottom and the stool under it are missed.
Reliability, I appreciate knowing that my house will always be cleaned as scheduled.
I also like that I do not need to worry about having cleaning supplies on hand.
Another perk is being able to call a supervisor if there is an issue rather than having to deal with it myself.