I had my girlfriend buy me the CK One 2008 version for Valentines day (blind buy) and have since basically passed it on to my younger sister.
The 2007 Summer one was great - it smelt like Ck One plus icey-poles (frozen fruit pops). As a comparison, the 2008 version smells nasty and cheap. Its great as a toilet cleaner or a fragrance for a 15 year old girl, but nothing more.
In all honesty, I think the original CK One is best.