That looks identical to the one I bought - though I got mine from ebay (many traders sell the same thing on both Amazon and ebay in the UK).
It's fine - dirt cheap but doesn't look at all bad. It holds the phone reasonably well - not 100% clamped into place but it's not going to fall out. The cutaways are well placed - no problems with the speaker or camera and all buttons accessible. It doesn't affect the sliding action - it just grips the keyboard section and you slide the screen out when you want to type. It's firm but slim - no real padding - but it doesn't add too much bulk to the phone.
Minor niggle - the flap over the top covers the USB port so you have to have the case "unlocked" to use that. On the upside - it leaves the headphone socket clear.
Given the material it's made off, I suspect it won't last for very long before the "leather" cracks along the creases but for the money - it's still good value.