There seem to be a few recent threads on Bongos, but I'll chime in here.
We have been to Bongos on three of our four trips to WDW.
First time for drinks only and we really enjoyed it and thought, we need to come back here to eat. So we did and LOVED it. We were last there last August and the food was good. We sat outside, so we lost part of the Cuban atmosphere. I think if we go back, we will request seating inside.
I love the flank steak! It is awesome.