If so which one? (Make/Model)
Where did you get it (ie. Ebay).
How much did it cost (approx)?
How do you use it (ie to record brain paterns during the night or to determine your state of awareness (beta, theta, delta, gamma,ect)?
Did it come with software or did you make it work with some other program?
Ignoring Price as a factor, is this Truly the way to go VS say reling on Tracking Eye Movemtns to detect REM?
Lots of Questions but I realy am currious.