Well I'm back from from our diving in Chuuk Lagoon (now I know the correct name!)
Videos here -
https://vimeo.com/album/2597932
2 Days of diving with Blue Lagoon and 7 Days with ThorFinn.
All the diving was fantastic - if you are a slightly advanced diver, who is happy to go deep into wrecks, this is the diving for you. Multi deck engine rooms, well past points of visible light etc...
We had a mix of single (100cu), doubles and CCR divers and I think to be honest diving a twinset or CCR is the way to go, as you will mostly be hitting deco on every dive. On the San Fran, I had over 70mins of deco to do, according to my PDC...
To be honest, this type of diving isn't for the hand holding, 'the DM will take care of me' type of diving, you should know your stuff, its fairly deep - you should know your limits. They will take you to the site, show you around and then make their way back to the shot - its up to you, if you want to stay longer or follow them. Most of the time a couple of us were down on the wreck before the guide, they are cool, its a 'follow me if you want' type thing. None of this 'WHERES YOUR BUDDY!?! finger pointing' rubbish you get.
Staying at Blue Lagoon at the beginning, was comfortable, clean and very welcoming. Too be honest the diving was a bit more expensive than I provisioned for, as tax etc is all on top - but the staff, facilities, dive guides etc were great. Food was very western, and pretty good value.
ThorFinn - Lance who is well into his 70's now, wasn't as active as I imagined. I was expecting lectures of do's/don'ts and the rest, but he was hardly seen, I presume fixing this and that. When we did see him, he was very jolly and talkative. The boat is old, but I have to say very well kept and is in fine condition for the 'oldest liveaboard'. You can tell Lance is proud of the ship.
Cabins are nothing to complain about - some are ensuite, some are not - I would recommend upper deck cabins to get away from the heat / noise of the engine room / compressors..
We were spilt into 2 smaller tenders off the ThorFinn and the group sizes were ideal. The food on board was definitely aimed at Meat eaters, we had a couple of Veggies on board and I think they must of lost weight... there was a choice at breakfast of what you wanted, but lunch and dinner was a 'eat what you're given'. Saying that the food was nice and varied. You must try the Island steak at breakfast

The crew we all excellent, you felt they wanted to help, not just smiling for the sake of it to your face as you get in the Red Sea (sometimes)
We dived all the popular sites and at the end even got a dive on some deeper / less visited stuff by request.
There were no restrictions on what type of diving you wanted to do, be it Solo (which I did) group of 5 - whatever - wreck penetration without a guide - up to you...
They only stipulated max of 60min runtimes (which we hardly ever kept too) and that you do their recommended stops (which I can't remember - and again no one followed) it was all pretty relaxed.
They run a funky price system, which we all agreed didn't seem to make sense, but as we hired the whole boat, we got them to agree slightly more easier to understand pricing... o2 for the CCR was coming in at around 80-85% so OK, but not super.
Defo will be going back to ThorFinn in a couple of years.