The trip on the Indo Siren provided us with the cnance to see parts of the indonesian archpelago not readily availble in other ways. Being able to see both lsrge snd smaller underester vrestures during the 9 days of diving was great. On board facilities were very good and we did not for one moment get bored. M8st days are filled with 4 dives, with the exception of the first day of the trip (embarking proedures) and when doing land excursions. One dive was missed due to some engine issues on one of the dinghies. The last diving day only has two dives due to flights out on the next day. Food on board was great. The crew is well established and certainly up for the task. One point to improve: all dive guides should be present on all dive briefings.