I don't think it is too boring. It is the basics your need for this...I hate to be the negative Nancy, but I think Rally is boooooring. (Yep, thats the "Im too cool for Rally" smiley!) I guess just in comparison to other dog sports.
However, it is really good practice and I enjoy any time spent with my dogs, especially working with them. It is good for you and the dog to practice obedience in different atmospheres so definately take the class. I mean, even though I'm not a huge fan I still go on Thursdays that I don't have to work.