I bought bonica snapper in 2008 I think it was. First model was 720p no auto focus lock. Since then bonica has switched to 720p 60fps/1080p 30fps version. Camera is based on Aiptek and has autofocus lock (can be switched on or off).
Everything is great about the camera but do not take my word for it. Have a look at online videos and see for yourself.
What I can tell you is that you can spend 15000 dollars on a professional video camera and get national geographic results. You can also buy a go-pro which is cheaper than bonica but will require modification, does not have a preview screen and is not technically rated for scuba in the first place (albeit seems to work just fine).
What makes bonica good is that it is a hand held so you can hold it with 1 hand and swim about. You can also buy like a 100 accessories for it for anything from kayaking to scuba to mountain biking to car mounts and more. Stock battery lasts for 45 minutes continuous filming in 1080p. Stock battery lasts 1 hour continuous filming in 720p. If you buy an upgraded battery from aiptek directly you can extend battery live to about 2 hours in 1080p and about 2.5 hours in 720p. I have also just ran a test (for unrelated purpose) with 30fps CIF function. It films in a smaller format but battery lasted for 4 hours 15 minutes. Downside is that aiptek provides a larger battery and a larger battery cover which does not exactly fit the silicone skin. I can still close it with a little persuasion.
They have also allegedly came out with generation 3 of hddv housing but being rather secretive about it. I am about to buy it pending they show me photos.
Staff is personable and helpful so customer support is definitely there.
