Totally awesome. Snorkeled with this on my full face snorkel with gopro adapter for 1 week and captured the most unreal movies and never once fogged up or stopped working. completely waterproof. Crystal clear, easy to figure out. Also bought the 'selfie stick' and I walk around now recording everything I do like all the other lunatics on youtube.Totally fun and 4k video is UNREAL!You only live once so GET ONE!----Update: Been using for over 1 month almost non-stop. And, forgot to mention; I had this camera attached to the bodi-floaty all day long, floating in water without any case what-so-ever and did that for 7 days straight. Totally waterproof out of the box. I have been posting vids online and editing on the gopro cloud (too easy) and everyone loves the vid's/images. Actually had a relative think we hired someone to shoot vids of our condo lol.I went straight for the Samsung Pro Plus 128GB MicroSDXC Memory Card and it works flawlessly and holds TONS of video in 4K.-----last update for newbies like me that don't know what else to order or what they might need. I got lucky as all of the addons I bought worked out excellent. Take a look and maybe this will help you pick a handy accessory:start----1-29-17 My new memory came in and works perfect. Different model than my first 128gb but I see no difference other than price.https://www.amazon.com/gp/product/B01DOB6YUQ/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1My addons - took with me on the trip.1) Extra Thumbscrews: Perfect fit and look cool in alloy purple. Nice rubber washer on each one too for snug fit -> https://www.amazon.com/gp/product/B00CUAEOJ6/ref=oh_aui_detailpage_o08_s02?ie=UTF8&psc=12) First 128gb mem I bought works perfect. Tried a new brand (up top) for the hell of it. Can’t tell the difference between either – both work just fine and store major amounts of movies and/or a billion images. -> https://www.amazon.com/gp/product/B01CO48M36/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=13) 2 extra batteries kit. Identical to the stock GoPro Batteries and last all day doing scuba and taking shots. Never left the recorder going for more than 15 mins at 4k so cant say exactly how long you will get out of these but I easily recorded over 1 hours worth of 4k movies with images tossed in. -> https://www.amazon.com/gp/product/B01LWKCIQN/ref=oh_aui_detailpage_o04_s02?ie=UTF8&psc=14) Floaty was awesome. Keeps the camera boyant if you drop it under water and does not get in the way of shooting at all. Easy to see and fit perfect. Looks cool too. -> https://www.amazon.com/gp/product/B01ETXS4MO/ref=oh_aui_detailpage_o04_s03?ie=UTF8&psc=15) Dual charger for my 3 batteries. Works fast charging two at a time in about 1 hour. No problems and shows green light when batts are charged. Small and fits nice in my accessory bag -> https://www.amazon.com/gp/product/B01ETXS4MO/ref=oh_aui_detailpage_o04_s03?ie=UTF8&psc=16) Perfect accessory bag fits everything and more. Mine is packed! Small slots for mem, all my batteries, charger and cables. Holds my floaty, my short gopro stick (the fat one that comes with the accessory kits) and my extended type selfie stick. Nice and light and zips up. Good quality. https://www.amazon.com/gp/product/B00PMMB4X8/ref=oh_aui_detailpage_o04_s09?ie=UTF8&psc=17) Not really a gopro accessory but if you are going snorkeling you MUST get one of these. We had them sucked to our face for a week and got some awesome underwater footage of kids and fish that look like ‘finding nemo’ movie. Try them out – they are awesome. Not cheap $$ wise but I sent so much on crap for my trip that I said what the hell, just do it. https://www.amazon.com/gp/product/B01K3Q16AI/ref=od_aui_detailpages02?ie=UTF8&psc=19) Lastly, this kit has more crap in it than you can imagine. I don’t know what half of the parts are for but maybe someday I’ll have a need and reach in the bag to figure out what to do with what. The floaty stick in this kit is good for snorkeling. The selfie sticks are too skinny and both of mine are metal so I didn’t want to take them underwater. The fat floaty stick in the kit compliments the bodi floaty (above) and again, looks totally cool. A few of my thumbscrews wound up rusty after 2 days in the saltwater and I cant remember if they were the ones that came with this kit or what. Either way, get some extra thumbscrews – longer the better. https://www.amazon.com/gp/product/B00PLBXUMS/ref=od_aui_detailpages05?ie=UTF8&psc=1Thats it!