I got into Qatar about almost 2 months ago with a business visit visa. The visa states 3 months, but, actually the immigration only allows 1 month and you need to renew it every time it is about to expire. Another month extension is all you get every time you renew. I'm about to renew for the 2nd time, i.e. to make it 3 months by now. Hope I don't have to get out of Doha and come back again as what I used to do before I got the business visa. Anyway, shall wait and see what happens (whether or not it's going to be extended) after next week!