Just the same issues you face w/ any bat - they all have a limited number of hits in them before breaking or going dead. If DD is in love w/ her gamer, pick up a used model of the same bat and use it for BP to save the gamer. Once they get bigger and stronger, IMO its not realistic to get more than a year out of a bat if its used for games and practices.
I have heard the R/T are notorious for getting easily dented so I was concerned that the machine balls might not be the best thing for the life of the bat. Right now I have DD use her old composite bat for machine pitch even though its a slightly different drop and balance than the R/T.