We were just on Navigator. Great ship! Let me know if you have any questions.
P.S. - Can't help you with CoCo Cay as our cruise missed it due to Dorian.
Loved the improv musical guy at Schooner Bar. Very talented and so funny. We ended up going every night.
I can't comment personally but if you like slides, the Navigator ones are a ton of fun (comments from our kids). The lines on The Blaster (i.e. tube one) do get long so try and go early, or on a port day if on the ship (or maybe later in the day would word too). The Riptide slide (mat one) moves faster.
Laser Tag is a blast. My one complaint is that the hours aren't great if you also go to early dining and a show, as it was 4:30pm-8:30pm on non-ice show days.
Ship is wonderful. I especially like what they have done with the pool deck area, and there is great seating all around (regular loungers, hammocks, cabanas).
BensDaddy - Coco Cay was awesome! We did all the waterslides, went snorkeling to the shipwreck and built sandcastles. The island is beautiful and even with two ships in port, it did not feel that crowded at all! Hope you guys enjoy!