I don't have any real experience with Martin, but your post got me courious. This bow has an ATA of 30 1/2", a BH of 7" and an IBO speed of 320. The bow is a little short for my taste, but I like an ATA of 36" or higher, but that is just my personal taste. The IBO speed looks good, and there is nothing wrong with a 7" BH. I went out to
www.huntersfriend.com to get the specs and they gave the bow a really good write up. They noted hand shock was very minimal and it has an amazingly smooth draw. Sounds like it would be really good bow. Here is a link to the write up.
http://www.huntersfriend.com/2008-Martin-Cheetah-Compound/cheetah-compound-bow-discount.htm