We have used the Aremiti 5 ferry on several occasions- to begin and end trips to Moorea and for day trips to Papeete from Moorea. We have also used the slower Aremiti ferry after missing the 5, both ferry's very comfortable. Super clean, nicely air conditioned inside.
If you are planning your holiday and unsure about luggage service on the Aremiti 5- at both ends it is possible to put all of your luggage into a luggage 'crate/cage'. These can be easily located at each end (ground level at ferry terminal Papeete end, ground level at side of ferry building Moorea end, both signposted in English as well as French). No receipt/ticket is given for your bags but you will see the crate come off at the other end and be able to pick up your bags. Very convenient.
The ferry is airconditioned with good food and drink available on board. There is outdoor seating ( a bit tricky to find the door but its there). Aremiti 5 journey takes only 30 minutes so not quite long enough to get seasick if there is a swell at sea! Otherwise boat is so large that you feel little movement.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.