Just had my new GAHH top with glass window and defroster installed. Very pleased. Fit and finish is nicer than the original top (2000 boxster). I love having a defroster in Florida during the humid summers. Also, no problems with field of vision with a smaller window.
I used one of the recommended installers per GAHH so that if anything goes wrong, the warranty will pay for labor. Got a great price. $1,200 installed.
Had the installer purchase the top for me from GAHH.
Eric