How easy to fit the cielo? I've been looking at that as well.I bought the coveryourcar cielo. It's a perfect fit and very snug, very good quality. Really pleased with it.
Also this one, Cover Your Car - Tailored and Fitted Car Covers Worldwide :: Nissan Fitted :: Nissan GT-R :: Nissan GT-R (R35) 2009 onwards ADVAN-TEX Outdoor Cover - Fully Fitted, made to order, Colour Choice ADVAN-TEX , similar but more layers, and you can add an alarm.