A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
I asked them before ordering mine about that (saw that on a french forum too) and they already fixed it. The problem was for Integra with Bridgestone tyres (like mine) but I had no problem with mounting mine.
Actually it's not big deal, you only have to remove the grey trim (1 screw and 3 clips) and you have access to the settings. I use grease quite often so I only need to service it every 2000 miles or something.
Yes and no. It's only a protection for your chain drive, it's not air or water proof, but it gives a good look and still protects the bike from grease. You'll find more informations on http://www.rossocromo.fr/category.php?id_category=18
Didn't know Integra wasn't imported in the US. But not...