I think it's pretty. There aren't really that many times in life that you say your full name out loud (except parents who are mad at their kids!) so I don't think it's a big deal if it's a little long. Just more to write on official forms I guess?
Sounds pretty and no one uses the middle name. I only use my daughter's middle name when I'm trying to get her attention. It's more important how first and last name sound together.
Re: Is this a mouthful? Name help.
Either way I think it's a great choice!