Okay, so I just now got my Booq Viper (its spelled Viper on the packaging) case.
First off, let me say, this is a very very nice case. It is a black nylon looking material that looks very sturdy, with some small bumpers on each side. The inside is red and black, very classy.
The MBA is a perfect fit. And when I say perfect, I mean it won't fit with my Speck hardshell case installed. If you know that case, you know it adds NOTHING to the MBA, but somehow the fit is very tight. I jammed it in there and almost couldn't get it out. I took the Spec case off, and it fit in perfectly.
I put in the charger, the long cable, a WD 1TB hard drive, and a USB cable and I closed it.
It zipped fine, it wasn't hard at all.
There was the inevitable bulge, but it wasn't as bad as I expected. I am now convinced the case I want is just physically impossible. If you want to put the charger and a hard drive, both of which are thicker than the MBA itself, you will need a case where two MBAs fit, and that would make it big. I can't have a svelt , tight fitting case AND carry my charger/external HD.
But, I think I can live with this one. The bulge is slight, it closes very well, and it gives me what I believe to be the slimmest carrying solution for my MBA, charger, cables, and external HD, and it feels like it would give me reasonable protection from a drop. Not that I would test it...
So, I would give it 3 1/2 stars out of 5. I think it would be a love it/hate it thing for most people, but I honestly could not make up my mind until I put my hands on it. I may still return it, but for now I'll give it a shot for a day or two.