Hi. Have any of you here tried Total Immersion swimming techniques? I just want to share my experience with you all. I've always condsidered myself a "good" swimmer and been doing so for more than five years now, but it is only last year that my swimming dramatically improved. I didn't think I was really going to improve significantly. My strokes are more effecient and I'm way more relaxed in the water. It taught me how to spend less energy in the swim leg to have enough energy for the bike and run.
Here's their free tutorial video
http://www.youtube.com/user/tiswim
I like how the techniques are broken down to the smallest details