I've spent the past 10 months working with a cosmetic dentist to get my four front teeth redone (bad cosmetic work previously). 
He's an Accredited AACD dentist and works with a really good ceramist. 
But here's the problem. 
I ended up doing 8 top and 8 lower after his recommendation. Prepless for all but the first 4. The prepless veneers were suppose to be thin and match the four, but...