Ok, I just made it. It takes about 30 minutes to put together. The instructions are easy to follow but halfway through I changed to watching the video. Which is linked to in the instructions.

Mine fly's really well, it has a lot of lift so it could almost use some more weight in the tail section.

I added some tape to the tail section to hopefully add some weight. It didn't really help and thus my reaction is to say it isn't the "best" paper airplane. I don't think there is any "Best" paper airplane.