For some reason (probably price!) the pixie is considered a good beginners kit. I would disagree. It is small and simple to the point of being practically useless. Get a Forty 9er instead. For a few bucks more you will have a decent radio when you’re done.
But since it is popular, I made a few videos trying to explain how it works: https://www.youtube.com/playlist?list=PLxpKweJs4V-1uTGK2TqhsQXCAd6eJtPhp
I think the way the designer was able to use a single transistor as both a mixer and power amplifier is pretty clever. Maybe some day I’ll think of something that neat :D
This does look like a good assessment of the kit.
Hopefully it was helpful. If you got to the activation video, you can enjoy the Spanish language music in between the dits too.