That's excellent. Really good quality.
Have no fear, my friend. The print will look excellent.
Make sure you send a PDF file to the printer, not a jpeg. http://www.damiensymonds.net/2010/05/making-pdfs-from-photoshop.html
Have you read this?
What leaps out from your photo and smacks me in the face is the terrible mixed lighting. You MUST get that under control if you desire beauty in your shots.
Channel Mixer will help it a tiny bit, but there will still be a fair bit of Handyman required afterwards.
Channel Mixer:
Red +100/0/0
Green +120/0/0
Blue +160/0/0