I found this one on ebay. Pretty much the only one that claims to be waterproof. It is ending soon and I would like to get one asap. But I can't tell if this is custom fit. Is that important? I am also looking at the Noah by Covercraft. Custom-fit is $190 shipped. Regular fit is about $150ish. Is it worth the extra to get a custom one? Does this ebay one seem like a good deal?

The sooner then better...