http://www.golfskypro.com/skypro
Just bought and received this Skypro swing analysis thingy. It gives you a lot of data on your golf swing. The setup is easy but you have to calibrate it everytime you change clubs. For example, I learned that my takeaway is very inside and at the top my wrist is very bowed.
It doesn't replace a coach but if you know what a golf swing should look like this is a good tool to have when you are not hitting well. It gives you instant feedback and valuable tips on what to correct when you don't have a coach around.
It only gives data on the club path so it couldn't tell me if I'm swaying or not transferring my weight correctly. But I guess you will need a biometric suite for that.