So far I love these items. I had a Yi 4k camera that was stolen about a month ago and I wanted to replace it. The deal I got on this bundled set was too good to pass up and I had wanted the gimbal and the selfie stick so this worked out perfectly. This camera actually performs better than the first one for some reason though it is the same model I had before. The resolution is just amazing in the 1080 60fps mode and the 4k mode also though there is a bit of a fisheye effect in the 4k mode. One thing to know is that the quality of video is only as good as what you're playing it on. For example, the 4k video looks amazing on my 4k TV, but when I view it on my laptop it stutters due to lack of processing power and a video card that can't handle the speed. The same is true of my phone. 1080 looks great on my laptop and fairly good on my phone but nothing close to the quality I get when connected to a 4k viewing source.
The gimbal works well and nicely smooths out the videos I take on my hikes. I did have one hike where the gimbal made a "grinding" sound and didn't move smoothly but I took out the batteries and it reset itself and has worked perfectly since. So far I'm really happy with this gimbal and would recommend it.
I like the selfie stick. The build seems good and the Bluetooth, though limited in what it controls, works well and has made making videos much easier and more seamless. I haven't had any issues with the connectivity and again, so far, so good.
Overall, this had been a great purchase. The quality and design of the camera is amazing for the price. The color is a bit warmer than the gopros but the difference isn't really that great (Hero4 and Hero5). Using the camera is pretty intuitive and the touch screen is responsive and easy to get used to. I've had a Yi 4k camera now for 4 months (counting the one that was stolen) and I'm still experimenting with all the settings. It's been a ton of fun.

I have to give this bundle a 3 star, not because the camera isn't good but because the memory card it came with is pretty much only good for taking photos. I get a "Slow Card" error all the time and as a result videos are often not synchronized video/sound and the video playback speed will fluctuate throughout the videos while the audio remains at the proper playback speed. In my mind there is no point to include a memory card with an action camera that cannot be utilized in it

Pros
-Camera has amazing picture and a lot of settings you can change.
-Very clear slomo
-Removable battery (in-case you want extra batteries)
-In Housing mode that allows you to change shooting mode with just the shutter/power button
-Wifi app to link to camera with phone makes viewing files, starting capture or changing settings easy

Cons
-Battery life never showing 100% even right after charging. always starts at 70~%
-32GB micro sd included in bundle gets a "Slow Card" error when shooting in 1080/60 which isn't even the highest capture setting.
-"Slow Card" error causes videos to get corrupted, De-synced video/audio. Video playback fluctuations
-Using the Phone app or having Wifi turned on with the camera causes it to drain battery life extremely fast
-Not waterproof without the case (which is why I got the bundle with the waterproof case)

Overall
I think this camera will be much more satisfying once I get a card that can handle the write speed of the camera. YI Technology should highly consider switching out cards in bundles to something that is actually usable with their product, otherwise why have a card at all? I'm not sure why my battery never shows 100% but I hope its not a defect with my camera. The camera has great quality and a lot of amazing capture settings (which are bogged down by the fact that the "Slow Card" that the camera came with can't handle them)

Image quality is quite good and the size and features are pretty good. However it has quite dramatic fisheye distortion. I've seen YouTube videos explaining how to remove most of it, so it's largely correctable, it's just a huge pain to do so. The menu system works pretty well and it isn't too hard to find and change any setting you want.

I am a first time action camera user so I wanted to start out small with the Yi 4K and let me say this camera is a BIG deal! The footage comes out so clear and perfect making it a breeze when editing. I hope Amazon releases its other accessories that are sold on their homepage in the future.

Great camera! Used it on vacation with a water proof case and it worked amazing. Only down side is some of the recommended SD cards by Yi were having format errors and didn't run properly even though it was a recommended card. This may just be a software error and needs updating. But overall amazing valued camera.