This swimming jacket is wonderful. It has given my son so much confidence; for the first time he is able to do some nice distance swimming. It's not cumbersome, and does not restrict movement. Well worth the money.
You should be aware that it probably won't make much of a performance difference with the D90; I was hoping to get slightly faster fps, but it made no difference at all. Not the cards fault though, I think the camera must cache exposures first, so I'm guessing the speed of the card might not be that important.