Since this is a review of a restaurant, and I tend to believe that a restaurant's first and essentially ONLY deliverable is the food, let me give Bungarampai my very highest recommendation based on the "konro".
This is a deceptively simple dish of what appears to be grilled beef ribs. The flavoring accentuates every single one of the many-layered thing that is the flavor of hot beef fat exploding over your tongue, filling your pharynx and immediately inundating your olfactory and gustatory centers. When you recover from the near swoon of the initial impression, you start to notice the textural nuances of fall-off the bone tenderness of the beef.
Short of creating food porn while trying to adequately describe the experience, let me just recommend Bungarampai, which by the way is the name of a small white local water lilly variant, as a restaurant worth visiting as much for the food as the ambience. Make no mistake, I would recommend Bungarampai as highly were it a dive by a canal or a pushcart operation by a smogged out Jakarta bus terminal, just for the konro alone.
Ok, the ambience is nice, its a sit-down joint in an old colonial house. It has a portico with a chandelier, that should tell you all you need to know.
Finally, when in Jakarta, modulate your expectations with regards to service, please, and just enjoy the awesome food.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.