One of the most stable and easy to use. I don't have a lot of coordination with handling and weather conditions, but with my CW4 it doesn't matter, it pretty much flies on its own. Make sure you fly this in a very wide area, it's like flying a Buick quadcopter. Calibrate the CW4 before your first flight, I highly recommend it. In one of the videos, you see the guy take off for the first time, and he flies in one direction until he either catches him with the remote control or stays in place. I don't know what it was, but it will do this to you if you don't calibrate it before flying so it takes off vertically instead of horizontally. Lots of power comes out and the downforce can make the CW4 wobble a bit, trimming is easy but if there's enough wind you can't keep it stable. Holding it in your hand, you almost have to remember that it's because it's so light. Thanks to the treads, it drops lower after a 360-degree turn, but without them, the CW4 levels much faster and smoother. It's damn fast at altitude and can rival a car at 40km/h, or maybe faster (hmmm. Bonduran?). I also recommend buying extra batteries as 16 minutes of flight time on 2 batteries just isn't enough. My only downside, which didn't affect my purchase or rating, is that the video may not play on Windows 10. I'm still trying to solve this problem. Cheerwing sent a replacement camera, unfortunately it didn't help, but the photos are awesome. In fact, Cheerwing offers phenomenal customer service and will even help you on weekends!