Swim Question

The wife and I are working on our swimming but I am sure it can be a lot better.  I was just wondering if anyone has used this DVD “The Essential Triathlon Swimming”.  I have been reading about it on BT and wanted to know if it was worth it to buy.

 I have signed up to receive Coach Koskella’s emails and new letters on swim drills.

 Some laps feel real good with a nice glide through the water with very little energy wasted.  I feel like I can swim for miles but then I have laps where I feel like I am going no where.  

Dan