I have one...all I can tell you is prepare to have your azz handed to you.
I still flip flop between trainer road and my erg videos...depends on what I feel like that day.
I would say for the money buy trainer road for 10 a month, much better deal.
DONT buy all the computrainer videos...waste of money in my opinion.
dont forget you need a computer sitting in front of you to really use this thing...and getting the lab model is silly...unless you just have cash to blow, your not going to need that level of accuracy...BUT I would get the cadence sensor...makes life so much better than hooking up all that crap that comes with it for cadence....I just drop the puck below the pedal at the 6 oclock position and ride. THE hr monitor that comes with it is finicky too...have to strap the receiver to my top tube or it will lose connection.
I really think unless you were riding a lot your in for a rude awakening when you do your first ride...there is no coast or rest, this thing adjust the watts to whatever cadence you are spinning...its constant resistance no matter what.
happy to answer specific if you want, there are a few of us on here who use them...I think paisan has one too.