Summary: It is really perfect.. Works good in 1920 and 60fps. The only thing I donk like is when you download your videos and you are going to edit them, they seem to miss quality, in fact, they miss a little bit of quality, you must to improve the contrast with your software for editing videos, or highlights or other things to make them look better or like the original.
Excerpt: Not knowing the differences, other than price, I ordered the AHDKH-301. Would have prefered the AHSSK-301. Not crazy about the two stage release on the rear door and my cover for the front lens shield/power button doesn't fit this housing. The AHSSK-301 is the same profile as the housing that came with my Hero3+. Should have ordered that one instead.
Excerpt: This camera is best at close focal range. It does poorly in low light. The infinity focus is very soft. I use got this camera for capturing aerial footage, so the infinty focus would be nice for me. I have been using it for medium action shots instead and it does great. If you need low light performance or focus to infinity then try the gopro hero 4 instead.
Summary: I bought this as a gift, it's a great little camera! It take awesome video and pictures, great quality! The app for the Phone is pretty cool, too. The only problem I'm seeing with it though is the battery life. It's got an AWFUL battery life. If the wi-Fi is on it's maybe an hour and a half. If that. We had to get a battery pack for it. Make sure to buy a memory card with ALOT of space, trust me, it will fill up fast!