I am out on travel. The hotel here has a Bowflex. I had never tried one before. It is pretty easy to figure out.
Bowflex sucks. After having used it, I can tell you unequivocally, that the buff guy in the TV advertisement DID NOT get that body by using a Bowflex. It is impossible to do supersets. The resistance arms are springy and move unnaturally. You are limited in the amount of weight you can apply. I used EVERY ARM and it felt like a warmup. This machine is just a gimmick and you won't achieve great results. Don't bother buying one if you were planning on it. If you have one, sell it to some schmuck and use the money to buy some free weights.
THERE IS NO SUBSTITUTE FOR FREE WEIGHTS.