I bought this sleeve to protect my new MBP as I usually bring the laptop with my school bag(s) instead of the laptop bag. Although there are a few brands and designs out there, I couldn't forget this one. As an avid CK fan, definitely I was kept on comparing other sleeves with this one - especially the thickness of the padding. CK has the thickest and the outside material is water resistance...
I chose the Spot 13'' in Navy (£30). The first thing I noticed was it has matte finishing- new design. The padding quite thick. But even with my Speck MBP Case, it still perfectly fit. The zip is also very good in quality with double leather zip holders. So far, it has two designs (Dot and Garden Birds) with two sizes (11'' and 13''). But I'm sure, they will be more designs coming up soon as the change of season.
I bought this sleeves online by using my UniDays discount - 10%. UniDays is a discount for university students. If you're buying the CK products in store, just show your valid student ID card at the till before payment. If you're buying through website, you have to register with UniDays to verify your eligibility. And then, you can use the verification for other website that offer student discount. As simple as that. To save on delivery charges, I chose to pick it up at the store option. They will send you a notification email. Easy breezy. A great option if you are busy and don't want to make unfruitful trip to the city but still don't want to miss your home delivery.
Last but not least...