(Before I Post I want to say I have a vested interest in Vision Art Books)
We use Vision Art Books in our studio.
www.visionartbook.com
We started using them more than 4 years ago and these books alone took me from doing weddings at $895 to $6000
Being able to design the cover of the book makes the biggest difference cuz people have to open up the book to see what is inside after they see the covers. Also being a layflat book makes design faster and that is the greatest expence is your time designing.