Parts fit, engineering, quality, and customer support are worth the small extra price you pay for a BVM kit. I've built many BVM kits over the years and loved every one of them----They spoil you. There are other good kits out there as well----BV's are the benchmark which all other kits are compared compared to. When a new kit is introduced to the market how many times have you heard, "How does it compare to a BVM kit?" BV's kits are worth every penny!

Kevin