Blue Manta is a fabulous boat. It was our 1st livaboard and had many of your same concerns. BM is a steel boat and is much quieter and stable than wooden boats. We had an upper cabin so can’t comments about lower cabins. Upper were very spacious.
Currents ran from almost none to a washing machine, they can change during a dive sometimes several times. Some sights (magic mountain) have significant currents. Communication with dm is important, remember they don’t get tips if you don’t make it back. Don’t fight the currents, all the divers are experiencing same thing along with DM, they will watch out for you.
Dives are done off rhib’s, 4 divers and dive master and a boat driver. Loved the small group. They group people by their skill level and experience. They come pick you up wherever you come up.
Internet at best is sporadic but never missed it. Remember when we weren’t tied to our cell phones but still somehow made it thru? We booked everything ourselves but are very comfortable traveling. Indonesia did challenge us, we left Wednesday at 6a, landed Friday at 4p, it was brutal. Make sure you bank card will work, our didn’t and it caused stress.
pm if you need more info.
You will be spoiled, the diving will blow your minds.
B