I had many of the cox plastic planes through the 1970s. The pt19 is the only one I managed to get more than two flights on.
In college my roomate had one and we flew it at a construction site over concrete and crashed it dozens of times, sometimes at full power straight down from straight up over head. It usually rubber banded back together, but sometimes the plastic cracked. I was able to fix the broken bits by gluing bits of scrap plastic over the crack using ca after cleaning the heck out of the plane with alcahol and 409. Sometimes I had to sand the cox plastic to get the glue to stick.

One day, we even let some girls fly it--GIRLS!! flying a model airplane!! something i've not seen before or since..

After a while we got bored with it and tried to do loops, but with the stock prop, no dice. It was a whole new plane when we put a 6-4 prop on it (left hand) and used 25% fuel. It would do loops then, but the lines would go slack sometimes at the top, causing panic..

It's fun- it will give you good experience in running glow engines and will probably make you want to get a better model soon- one made of wood. I went rc and never flew a wooden one, but I'm shopping for a kit now to use the old pt engine again.