One advantage of having the PT-40 is that it already exists in the Realflight G2 sim as the standard package. It is set up for the latest MKII design, so you can fly it at home on the computer and get the feel of the airplane before risking the real one at the field, should you be considering gettiing a flight sim as well.

I have the original PT40 design I built from a kit. It is a VERY docile trainer and a real floater. Set it up correctly, and it will literally land itself.