..it sometimes turns into an unsightly mess. It's difficult to match up your grain and figure when dealing with solid curly material. It will highlight where your joints are, reflect light differently when the boards are flipped etc etc.
Buying curly veneer sheets in sequence (from the same tree, in the order they were cut) makes life easier. Buying the widest, thickest curly maple material your shop equipment will handle, and resawing, and book matching will work nice. There is a premium attatched to these 2 methods, that should be passed on.
If you're using, off the shelf, unmatched curly maple, meet your client at your supplier, and show them what to expect. Or run the chance of not getting your final progress payment for the project.
Cheers and good luck!!
aw