As I have come to expect from Amazon's cases for their devices, this is an excellent quality product though on the expensive side compared to third-party cases. While there are some minor drawbacks, overall it is a very nice case. Quick thoughts:
MATERIAL - The exterior material is polyurethane that is comfortable to grip and doesn't get dirty. It is not smooth like first-grain leather would be, but it has a nice look and feel to it. The inside is a microfiber lining that protects the screen and keeps it scratch-free. The overall finish is excellent. You can simply drop the tablet into your bag and you won't have to worry about it getting damaged or scratched.
DESIGN - The case is slim, which is perhaps the thing I like most about this case. It hardly adds any bulk to the device. The Kindle snaps into the polycarbonate frame perfectly and stays securely in place. If you were to hold the front cover and leave the device hanging, there is absolutely no chance of it falling out. The charging port, volume buttons, camera, and headphone jack are not covered and are easily accessible. The case does not muffle the speaker sound either. The case has built-in magnets which keeps it securely closed, and prevents dust from getting to the screen. When you close the cover, the Fire automatically goes into sleep mode, opening the cover turns on the device automatically. This helps save battery life, plus it's convenient not to have to press buttons to turn the screen on or off.
USE - The front flap folds all the way back and stays flush against the back, making it easy to use the device one-handed in either landscape mode or portrait mode - very useful when you are reading. Since the case hardly adds any weight, one-handed reading is very easy. The headphone jack and volume buttons are easily reachable. The case has a built-in stand for hands-free viewing in landscape or portrait orientation - the front flap simply folds into a stand. While the stand works great on a flat surface like a table or desk, it doesn't work too well if you're holding the device in your lap or on a soft surface (like on your bed). So if you watch videos sitting in bed, the stand will be wobbly - this is perhaps the biggest drawback of this case.
DRAWBACKS - Three main drawbacks - one is price. Considering that the material is polyurethane and not leather, at $49.99, the case is expensive, far more expensive than third-party cases that are available for around $15. Design-wise the third party cases are perhaps just as good if not better, but the material and quality of this case are far superior. To be fair, I see this case lasting a lot longer than generic cases, so the higher price could be justified. Second drawback - the case needs to be removed in order to access the MicroSD card slot. I personally don't use this much because most of my content is with Amazon which I can view instantly, but this may be an issue if you plan to store movies on a memory card to watch when traveling. Inconvenient to remove the case each time to access the slot. Third drawback, as I've already mentioned, is the stand. While the stand works great on a flat surface, it doesn't hold up well on a soft surface or if you're using it while watching videos with the tablet in your lap. I mostly use the tablet to read, and only occasionally watch videos, so the stand doesn't bother me that much, but you may want to take this issue into consideration if you watch videos sitting in bed.
Overall I am very pleased with the case given it's excellent material, finish, and fit. Yes it is more expensive than generic cases, but since I expect this to last for as long as I have the Kindle Fire, I think it's a worthwhile investment.