What can I do with this?

Do you have some good start learning resources to suggest?

I have a QCX and a QCX Mini from them. If you ever wanted to try a radio kit, this is the one. Great parts, great instructions. Be anal retentive for best results.

I have a 40 m QCX+ and a 20 m QCX Mini. They both work well and were fun to build. I also have a QDX that I need to build. QRP labs have great designs, so I expect the QMX to be a good choice.

I presume you need a big antenna of some sort to use with this?

Here's the history behind it. https://www.youtube.com/watch?v=4H2n6CZOGw4