They try you out, you try them out.

This is not typical, but not necessarily bad.
They spend 2 days to try you out. You spend 2 days to try them out. After the 2 days, they decide whether to give you an offer, and you decide whether to accept it.
If they pay for the 2 days, you also make some money. Strictly speaking, they should not ask you to work without paying you. But even if they don't pay you, you can just treat it as a 2-day interview.
Since this is a trial, you probably do not want to quit your current job to try out this opportunity.

所有跟帖： 

• Don't waste 2-day vacation time on them, not worth it. -傷痕-累累- ♂ (0 bytes) () 12/31/2009 postreply 14:33:22

• That's called "opportunity cost" in economy. -Easy.Spin- ♂ (138 bytes) () 12/31/2009 postreply 14:43:54