Leota,
We went there a few years back, haven't been back since, and won't be going again for a long while more. That was our first experience with Cuban food (at the time), and it was beyond disappointing. The food was bland, and I don't mean not spicy hot, I mean no flavor. I had some beef and rice dish that tasted like it was cooked for patients recovering from a hospital stomach procedure. No flavor at all, not even salt. Some of the items that were fried were not heated through, which was just disgusting.
The atmosphere was interesting, and very very loud. Not a band playing that night, just the music turned up too loud. And the service.....there were plenty of trendy looking early 20-something servers around, and all the ones we saw (including ours) were more interested in congregating together and chatting with each other, than waiting on the tables. Service was just unacceptable.
We have since had real Cuban food elsewhere, and that makes the contrasts even more pronounced. Good Cuban food is a treat. Bongo's was a joke.
I have tried the walk-up window since then (in a pinch), and I liked what I had from there. But it will be a long time before we venture inside there for a sit down meal again.