Doesn't look good at all to me. Standard looks far better.
I find it funny that the guy who posted this is bothering with it when he made a comment just last week about "who cares what the engine bay looks like"
I remember that exact post and had a chuckle myself.
Personally, I think it looks a bit stupid seeing that hunk of plastic through the vents (not that the regular engine is much of a showstopper) but anything that hinders the ambient heat getting out of the engine bay is a no no for me. The heat from my tubular manifold had a decent go at the heatshield on the boot bulkhead (although didn't destroy it like MartinS's car) before I upgraded it and that cover seems to block the space above the manifold, giving the heat nowhere to go to. As it is, the first thing I do after giving the car a good thrashing on the track is open the engine cover to let the heat out.
At the end of the day, it's not my car, so who gives a sh!t about my opinion.