An interesting concept... but not sure it makes financial sense. You have the $10 monthly fee.... and the $100 per round trip fee. That could add up.... granted it includes cleaning and storage.
But, I guess I do not want to risk not having my bag when I arrive somewhere... or what if there is a change in travel plans? Or trip in vain? I still have to pay for the round trip.
I also do not want to have to go online to tell them what I want delivered. Then, I still have to pack it up and arrange to have it shipped back.
In addition, many hotel will charge an additional fee to accept and hold the bag.
Could get very expensive.
I could never really see taking advantage of this service.