Hello dog,
After looking at the site, it does seem like a standard sales letter to me. I appreciate that it's short, but one thing (small thing) that lept out at me was the redundancies with dollars.
For instance, if you write $10, you do not need to add dollars after it. The money is implied by the dollar sign. It wouldn't be so bad, except you're not consistent with your use (i.e. some instances are followed by dollars and others are not).
Another problem I see, from an affiliate marketing perspective, is the prominent link to your affiliate program at the top and bottom of the page. What's to stop someone from signing up and purchasing under their own affiliate account, thus undercutting the affiliate that referred them?
Of course, it's your choice whether to have a closed affiliate program or an open one, but I find affiliates are more eager to promote your program when they know their commissions are more difficult for people to steal.
Other than that, I did like the clean design and layout. One of the few sales letters that didn't make me gag upon seeing.
Good luck,
~ Teli