It's hard to go wrong buying this machine if you have the money.
StarTrac markets the P-TBTx as a crosstraining option for the user. You are able, according to StarTrac, to work on strength training while you are doing your cardiovascular workout. My only questions are ' why would you want to? I know the guys at Treadmill Doctor are fitness challenged and everything, but I would presume to think that you will do weights when you do weights and cardio when you do cardio. Other than that, if you like it and don't mind the money ... buy it!