BDD has been shown to reduce the cost of desktop deployment dramatically, from about $500-1000 cost per PC in the case of manual installation down to less than $100 per PC using Zero Touch deployment.
BDD v2.5 is the successor to BDD v2.0 which was released last fall. BDD has been used successfully to deploy 2MM desktops in the Enterprise space last year. This solution is free and available on TechNet website.
The updates include for BDD version 2.5 include: