Better than Expected
The Graphics are pretty good for the DS, they are clear and sharp and you can clearly see what is going on. While they may not be anywhere near as good as the console games, graphics aren't the main feature of a Guitar Hero game.
The Playing takes a while to get used to, at first the strap didn't hold my hand in properly and I couldn't hit the buttons and strum at the same time, but after a while I got used to it and it felt natural. At first it did cramp my hands a little, but once you get used to it, they aren't really an issue.
While there are only 25 songs, this isn't too bad as there is a lot of replay value and most of them are master tracks. While the set list may not appeal to everybody, there are a variety of songs that means at least a few will appeal to most people.
Overall I am glad that I decided to buy Guitar Hero: On Tour, it has good presentation, it is natural to play and has good replay value. Although the set list and hand cramps may be too much of an issue for some people, I found them easy to deal with, and didn't ruin my gaming experience.