This afternoon I finally maidened the Phantom 4 nearly a week after arrival. Went to my usual test site at Ft. Armistead. I wasn't going for distance or records today. Just testing her airworthiness & some of the features. She is running the latest 288 AC FW. I did NOT update the RC to 1.5.80 to avoid the silly CSC change. This isn't some sort of full-fledged review just brief initial thoughts. First off the Phantom 4 performs beautifully. She flies very smooth & precise. Stability is excellent & hover accuracy is measured in inches. Very impressive. In P-mode with OA enabled she feels a bit sluggish compared to a P3. This is because with OA engaged she is limited to around 22 mph & that is a significant speed reduction from the normal 35 mph.. I will probably disable OA on missions where it is unlikely to be needed to avoid this speed limitation. TapFly works well but carries the same 22 mph speed limit. Be aware that if you tap above or below the horizon the bird will just keep on climbing or descending until you reach the altitude limit, OA avoids the ground, RC control is lost, or she reaches battery failsafe. I did not test ActiveTrack because I did not want people laughing at me as I ran around the parking lot pursued by a strange & angry-sounding whirlybird gizmo. Sport mode is...as you will see by this screenshot at only 85% throttle....sporty & VERY fast. 78.1 mph...nuts!!! You have to be very gentle on the sticks for any semblance of smooth flight as she is a real thoroughbred & eager to please. She is hyper-responsive to the slightest stick input. What would be really nice here is if DJI made dual-rates available that automatically kicked in custom Expo & sensitivity settings when Sport Mode is selected. If you need to get someplace in a hurry or you just feel the need for speed then Sport Mode is your friend. Now for my one & only disappointment from this afternoon's flights. Battery life! In three flights I got 18, 17, & 19 minutes of flight respectively for a grand total of 52 minutes from three batteries (don't blame me the Go app did the math!). That's less than half of what two batteries should get at the stated "28 minute" run time. Had the batteries lasted say, 25 minutes, I wouldn't have felt so bad. But at 10 minutes less (1/3rd) than advertised I am a bit bummed. Granted I was buzzing around in Sport Mode quite a bit just for the "Wow!" factor as she went screaming past & that surely taxed the battery. But 10 minutes less? Next time out I will fly an pack or two in straight P-mode for comparison. I have not yet had an opportunity to review my footage from today so comments on camera, gimbal, & video performance will come later.