two of my friends had their makeup done from shirley too and they looked great! but she arrived really REALLY late for one friend's appointment and that led to enough time for only a 1/2 hour with the photographer which really pissed off my friend.
Always make sure that she is the one getting the brides ready, as sometime she sends her neice to the brides instead of her going (which is not worth the amount and if she is not doing the job herself) I've notice that some people have the bad experience with her.