I've read Safe House and it was quite good.
The 1227 Facts was interesting and funny, worth dipping in and out of.
I liked Bright Young Things as well, Scarlett Thomas is one of my favourite authors and although this one was a little bit more predictable than some of her others, I still liked it.
I've already bought 100 Year Old Man, Thursdays in the Park and Lewis Man because of this offer, but haven't read them yet. I wouldn't have paid full price for the first two, but like Mrs Pennyapple said, I'm reading a greater variety of things now that I wouldn't have read before, not unless they turned up in the charity shop anyway.