It is hard to give a bad repairability score to this device, because only one part of it will need to be replaced.

The ink cartridges are very easy to replace (as they should be).

The entire assembly is held together by one screw.

The actual print head is very delicate and is too small to be repaired, so if it breaks the entire printer will have to be replaced.

Update: I have now granted a repairability score to the Epson Stylus 820 Photo printer.