The diving at Lembeh was absolutely amazing. Two Fish has really great guides - we had Celin who was a total pro and could find absolutely anything in the water. We kept the same guide all week - they really listened to requests, and were just fantastic. We saw so much variety in creatures during our stay, and I am very keen to go back in the future! They also really look after you on the boats, and take care of all the equipment for you (which I wasn't used to!). Tip: Bring some cash to leave a tip as there's no way to get money once you are there. There are ATMs outside Manado airport.