Another difference is there is no well for your ink. It is very easy to over ink the screen. With screen printing I used lots of ink but with thermofax printing this can get you in a bit of a pickle. At one point I had to scrape the ink off as it was getting everywhere and my prints were too ink saturated.
Clean up was very easy. The screen has a plastic frame so there is no worry about damaging cardboard. It is very important to only use cold water and hot water might damage the screen. But with a drop of washing up liquid and a soft paintbrush, the screen was clean in seconds!
What I loved about printing with this screen was the noise it made! Difficult to describe but like that noise when you scratch your fingernails against textured vinyl.
You can apparently turn the screen over and print to achieve a mirror image. However, this risks damaging the screen so I have not tried it yet. I will probably try this when I have had enough of this screen.
Next thing to try is pattern repeats!