Hey guys, what are your opinions of these cases?

1. Soft silicone 2-piece case
- I suspect the fit will be quite loose. How do they stay secured on the phone? I have a soft silicone 1-piece case for my 5800. While the fit sucks, I suppose it does offer protection. I really liked the 2-piece hard rubber 5800 case, but the clips broke off within a few weeks and I think I read that the N900 version leaves scratches. Is this true? Are there any hard rubber cases that don't leave scratches?
2. PDair case
- I am not a fan of the white stitching or the clear plastic keyboard covering (will it eventually loosen the slider?). But Noreve cases are so damn expensive.
3. Is this a PDair clone?
- Looks like a clone but with folding on the opposite side compared to PDair. And no ugly white stitching.
4. Zagg full body
- I've ready they only last a few months. Is this true?