I was on crew in college and "form" is always one of the most important things. I feel like a short intro on how to row - at least so as not to hurt yourself - is probably in order. I can't tell you how many times I've been to the gym where there is a concept2 and watch probably 9 out of 10 people just hack away at if its a chainsaw.
NB: After reading this I watched a YouTube video and the ad was for a competitor product. That always weirds me out.