Dimension Printer
I had the highest hopes for this printer. The only errors it has had historically were the result of user error. After 3 years of little to no maintenence, this printer is still working amazingly well. This printer has dissolvable support material, so the arch of the torture model was no problem. We still only have one material color however.

M2 Printer
I have only recently started using this printer. We rarely use support structures with it, so that is how I set up the print. The arch didn't bond to the print bed, so part of it refused to print. I also striggled a bit more with the holes. The top surfaces are, however, suprisingly smooth

M3D Printer
This cheap printer is capable of a much higher Z resolution than the others. However, the printer failed the torture test almost immediately. The support raft was not laid down correctly, so the beginning of the actual model would not bond. Some of the photos are upside down

3D Touch Printer
While this printer was more successful than the M3D, the setup can take a very long time. Replacing the material can take up to 10 minutes, not including purging the old material if you are using a new color. The material also has a tendecy to become brittle when exposed to air. Processing the model requires time too. Larger or more complicated models can take longer than 10 minutes.

The resulting file is then moved onto a USB drive that is then plugged into the printer. The printer can sometimes refuse to recognise the drive. A few re- inserts can fix this. The below photos are sideways.

The printer basically refused to print the arch without support. There was also some stringing between the poles, and the surface was rough.