I'm not going to comment on the
horrible record of customer service, months-long delivery times, and generally terrible business practices that Botmill is known for. It's been documented elsewhere and linked in other threads on this board.
What I will comment on...
1. Are you
still selling Sells Mendels? Seriously? This design is 3 or 4 years old, has been well surpassed by Prusa's Mendel and other newer designs, and has a stupidly-high part count. This is not a printer you should be selling to people as "cutting edge". It's not, and hasn't been for quite a while. The fact that you're still selling this design implies to me that you can't be bothered to spend the money and time developing a Prusa-based printer to sell - you're in it to make a quick buck off of people who don't know any better.
2. From the youtube video description:
It even printed the overhangs without supports!
Being able to print bridges and overhangs is not a feature worth advertising. Any reprap printer that is calibrated reasonably well can do this. If this is the best "feature" your printer has, that's pathetic. Additionally, the video doesn't show what the surface finish of the part looks like. How's your layer alignment? Any z wobble present?