After reading numerous reviews and being left in limbo in regards to what the trip would be like due to the mixture of positive/negative responses, I decided to head out on the trip, as I knew that it would be amazing if it turned out as planned.
Once upon the boat we appeared to do some sort of lap of the lagoon, just tohead back very close to where we left off. Whether this was for entertainment or they were looking for a specific spot, I don't know! However there was complete silence and no direction over what was happening - which would have been nice.
After around 10 mins of driving around, we eventually came to a stop. I was the first to get in the water and after reading about jellyfishes was quite concerned and the prospect of swimming in pitch black darkness was also quite alarming! Despite this, once in the water and swimming around (particularly doing breaststroke) you could see the glow around you. It was quite amazing to experience it, regardless of it being quite a weak glow to what I had seen in some other images - it was faint but still very cool to observe nonetheless. The bottom was probably around 4ft deep and covered in some form of sludge/silt which was quite disgusting, however you were informed of this beforehand so it didn't come as a surprise.
To their credit, the captain was very informative of what caused the phenomenon, however it may have been better if they had pulled a bucket of water out, to provide a closer look.
In regards to photography, you're charged $25 US dollars for all the photos they take (maybe 5-10) - it would have been nice if this was included in the price of the trip, they weren't anything groundbreaking.
To anyone wanting to go, or anyone intending to bring a camera, a few tips on how to take the photos that were done so on board, it may save you a few pennies! Have a very slow shutter speed, maybe around 1/4 of a second, with an aperture of around f/8, an iso of around 400-1000 as well as using a fill direct flash to illuminate the subject faintly. This should provide a rough setting for which to play around with to capture your images. You may be able to get something with your phone if it allows you to control these settings, however I'd advise some form of camera for the best results.
I think it may be worth the tour operators advising the best times to head out and see the lagoon, as it appears to me that the water/organsisms are brighter at certain times of the year and it would be good for these to be shown.
Hopefully this should provide an honest review of my experience and help others to make a decision!