I can't remember where I heard this (actually I probably read it somewhere on this forum), but apparently one UK owner of a Triplex glass roof was cruising up the motorway at a fairly high speed when suddenly the glass panel popped up and out of the fibreglass frame, and shattered on the road behind the car. I have no idea if this is true or not, but it helped to hold me back from bidding for the roof that was available from Australian eBay the other year. Apart from the high starting price and the big problem of shipping something fairly fragile of that size safely back to Europe, I didn't really fancy the thought of it parting company with the car on the Autobahn! They do look the business though, eh!?