I have explored the x350 Pro for about a month and tested it with Mission Planner. I must say the X350 Pro flies very well, pre-tuned. It Loiters perfectly out of the box. Last year I built three APM F450 and it was nice for a change to have a RTF.
The x350 Pro Flight Controller Devo M, has a variation of Arducopter in it. I have included a video recorded the first day I hooked up the x350 Pro to Mission Planner and sure enough, it did every standard thing with the Mission Planner. Attached here is copy of the Full Parameter list extracted using Mission Planner. param-full-list-qrx350pro.txt
Included in the x350 Pro combo, is a Devo F7 radio transmitter, but I have tested it with my FrSKY Taranis and X8R and it works just fine (if you rather buy the BNF version). The x350 Pro is capable of handling the 6 flight modes and 2 optional switches. I tested some basic waypoint routes and it flies just as well. The only thing, out of the box, without any modification I am not able to add telemetry module or osd. However others have managed to solder them on. I was told a newer version will be out and will include OSD soon.
The FPV videos shown here were filmed using the iLook+ 1080p. I have the original iLook and iLook+, both version released under a span of 6 months. I will definitely recommend going with the iLook+, as it makes a world of difference between the two. The iLook+ comes built-in with a video transmitter, sized to be a GoPro so you can also use it with other gimbals. Some people call it a FPV backpack, and have been packing them into a box to make it easily swappable for the convenience. I have not flown beyond any further than what is shown on these video, but it definitely has some range using a Fatshark goggle or the F7, more than enough to film a football field and baseball field. The signal strength of the video is on the side of the short F7 antenna. For the Fatshark I use the matching 4 lobe skew planar wheel . The G-2D gimbal is definitely lighter than the gimbal i purchased off eBay and a lot more refine.
All in all, a quadcopter to consider for a BNF at about $310 at www.bg.com/x350pro/bnf. The 5200 mAh LiPo gives me about 17 minutes of flight time or more. The original battery can be expensive.