They are big, big, big and you will need to run serious size battery cable to avoid voltage drop, but they are one hell of a powerful compressor. As Gasburner said, it has a fan to run continuously and is easy to rebuild.
I had one of their tanks which was good quality too. You will need to work out where to fit a tank and what size you need.
Yeah I rate them. Have had one for 6 or 7 years and was left for 6 months in a metal box that filled with water and rusted out, compressor is still running. If your running 24V wire it up, will handle it and run twice as fast.
As mentioned they are rebuildable but are a big solid unit.