I just received mine. I chose the vertical configuration so I don't have to take the sleeve out of it out of my backpack to get my computer out. The quality and customer service of sfbags is next to none.
I got the tucano second skin for my unibody mbp and it fits like a glove. The padding is a little thin but its enough (I put it in my targus bookbag with its own laptop compartment) I love how it feels... just like suede . I got the brown one and it looks great.
What's the difference between the Taipan and the Vyper sleeves? They would a) serve as double protection inside an Incase sling pack
b) maybe taken out to a coffee shop with just the latop
c) needs to open flat so I can use it as a base for the laptop on a table
I had the Incase 15" Neoprene sleeve, and then I bought the Caselogic Sleeve.
There was nothing wrong with the Incase sleeve, I just wanted a pocket where I could store the charger.
However, as far as protection, I'd say they are about equal. Both have a nice soft interior. But, I like the zipper on the Caselogic better (it's smoother and less prone to scratch the MBP). Also, I like how the zipper opens on the Caselogic (opens length wise and then width wise [think an "L"], as opposed to the "[" shape of the Incase).
Call me anal, but I wrapped my MBP with the Speck Satin seethru cover and still put the MBP into the Caselogic sleeve.