I think it would be like the other bitcoin ATMs that charges almost 10% or more which is too expensive for me if compared to P2P. But I am not from United States.
Bitcoin ATMs are not making inroads here in my country probably because there is really no discernable demand for it and if in case the fees can be as high as 10% then I would always prefer to deal with P2P (already available here for years) in converting my Bitcoin to my nation's currency. However, if one is really needing some cash as soon as possible then these ATMs can be there for anyone who can find them. And since these machines can still be found is telling us that there is still business that can be done with them...and make some money for their operators for sure.