Went there as just about my only tourist destination during a short visit to Jakarta. I have a great interest in military hardware so this place surprised me with the amount of aircraft, unusual armoured vehicles, and a good collection of small arms. However, it does look like the curating of the collection and updating stopped just after the Museum opened in the early 1970s! Could do with a few more recent objects. The dioramas were reasonable.
Very cheap entry fee.
The main downside was that there was no English signage around the displays and also for guidance around this fairly large esablishment. While I'm all for keeping with national languages, the fact remains that most foreign tourists would benefit greatly from English.
Something to consider if there's not a big cost involved for the management