@FedExpress - don't agree with it being harder to coordinate i'm afraid.
@TCF - yeah, I can see how there may be some potential muscle imbalance issues, but if you continue to work to balance out the body with other exercises then there should be less/no issues.
I tweet - @ashtennis guru (no spaces)
I Shoot - www.flickr.com/photos/ashtennis guru/ (again no spaces! grrr)