I bought the DD KB's about three months ago and have quite enjoyed them. I was already practicing onehanded olympic lifts with DB's and barbells and so did not expect to be hit that hard by the KB's. They are very difficult to stabilize and controll...very odd point of rotation during many of the lifts. Some of my favorite spinnoffs with the KB's involves threading a towel through the handle for various swings and throws while really stressing the grip. The KB's are fun but for the $400 I would get a DB handle and 50kg of weights, a set of american-gymnasts paralellettes, and a set of gymnastics rings. I think that would still leave about $100 to put towards the food bill!
Robb
By the way...checkout www.crossfit.com....some REALLY good information right in line with EF.