reduced engine access with glass rear window

[DG Boxster]

The plastic window on my 98 Boxster is cracked and hazy. The strong NM sun probably isn't helping.

I'm thinking of buying a replacement top with a glass window. I see many references to "reduced engine access". Robbins even includes some sort of strap that holds the window out of the way somehow for working on the engine.

How bad is it? I'm not in the engine that often but I'd like to hear peoples experiences.

Thanks!