Short connection in Doha

[Gordon17]

I'm trying to book a trip to Thailand at Easter at rather short notice.

A travel agent is offering me Business Class flights on Qatar, but with a 40 minute connection in Doha on the way out. He assures me that this will be ok but I am very nervous.

Does anybody have any experience of changing planes in Doha and an idea of whether the connection is feasible?

Thanks