I just got mine and I have to say I'm very, very disappointed. I got the side-zip style.
I specified I have a K2, and it does fit, but just barely. I can't just slip my Kindle in, it's a struggle each time. It takes two hands and lining the Kindle up just right, then stretching the fabric to make it work. Then another struggle to shut the too-tight zipper. It's even harder to get it in with the open edge of the cover facing inwards, so I have been leaving it with the opening near the zipper.
I got the extra strap, but there is no ring for it on one side, you have to attach it to the zipper. But if you actually use or wear the strap, it forces the zipper open and leaves your Kindle exposed. Which was a near-tragedy yesterday when someone jostled me when I was walking with a cup of coffee and my Kindle in the BorsaBella bag over my shoulder. The zipper had slid open and the coffee -- well, I'm just lucky I had a lid on the coffee and the spill was very small. I know it's fabric and not waterproof, but between the Kindle only fitting with the open side out, and the zipper that won't stay shut, I had no protection at all.
I really wanted to like it but it has so many design flaws I will never use it. Pretty, but not at all useful. I hope she can redesign so it will work, she was very nice to deal with. But not risking my Kindle for her again.