Hi Chris

Great idea, great website. I don't think the business model is a bad one, however there is two major things to overcome. Trust that it would be an effective service and education to let people know about it.

In your testimonials as far as I could see the only comment where they had purchased your system, used it and that it had worked, was at the end of the list, I think this would be better moved to the top, people might not get to the bottom.

Secondly this is just an idea, if you haven't already though of it, why not approach manufacturers to prebundle your stickers, this will give them a bit of a usp to their product as well, plus you should be able to gain some credability through their promotion or adoption of the service.

Good luck Alex