I shot loads of pictures at 800 iso on the P30 and it was amazing. It was as good as my P25 at 400. It has far less noise than 400 iso 120 film. It just depends what you want in your images.
This realy shows how important it is to test one self before buying.
Someones amazing 800 ISO is another mans useless 800 ISO.
I bought a P30 myself a week ago, and it was absolutly not because of great 800 ISO.
To be honest I didnt even test 800 ISO, only 400 ISO.
I think even 400 ISO is too noisy. But I am coming from
Canon 5D and are probably spoiled with that performance.