25 years ago I bought a Sony TR-81 to take mostly underwater videos. The camera was $1800 plus the $1000 underwater housing. It worked great until my backpack opened up and it fell into a stream. The GoPros are much cheaper and that was going to be my next purchase until I went to Hawaii this last winter. Many had the Go Pros on sticks when snorkeling and some used the the I Phones with cheap under water housings. I bought one and have only tested it in the pool so for. But this seems the way to go for the average recreational diver or free diver. The camera never gets outdated and is generally upgraded every 2 years with a contract and is free.