[Slick]

I use them on a few designs:

My planet maker Battleship, because I need repair capability any way, it has a huge maintenance cost due to its Matter Gravity Sphere component so I don't want to spend excess turns in transit to asteroid fields. Each turn I use the pod and the on board spaceyard repairs it making it ready for the next turn. Note that you don't need a spaceyard to repair the Matter Gravity Sphere (only a repair bay), but you do need a spaceyard to repair the EPP.

My Ambulance Destroyer (which has a Medical Bay, speedy engines, solar sail and lots of supplies) because I want to get any plagues cured as fast as possible. I don't have a spaceyard on the DD obviously. I build, then mothball usually 3 or 4 of these Ambulances strategically placed in the empire so that I can get it to any plagued planet in a few turns.

Slick.