I got a crazylfie micro quadcopter for my birthday and love playing around with this remarkable open development kit. Yes, it’s not just a very small but powerful quadcopter, it is also comes with all the design files and the tools necessary to modify the software and/or hardware, which in it’s current state is already quite mature. Having said this, if you look for a ready to go quad copter with all cutting edge features – look elsewhere. While the hardware with it’s 10dof sensors, fast cpu and expandability is – considering it’s size – quite complete, there are still a lot things to be developed hard- but foremost software wise. But this is not a downside, because the product crazyflie is not exactly a quad copter, it is a quad copter construction kit with every bells and whistles whith a blog, a wiki, a forum with a whole quad copter construction community, inviting everyone to participate. And for that I’m just loving it.