we have a guy at MF who has a glassback. I saw a glassback twister at SEMA, and ive also seen a glassback 300C, and i think that it is a pretty sweet feature...
my only concern, i dont know that there is a curtain or anything that goes along the inside...i have a sunroof in the stratus, and at times, i dont like having the sun shine in my eyes...i would think that would be a problem with the glassback.