Ich Leibe Breunigerland!
Sindelfingen is the closest good-sized town to a group of military bases that my husband frequently finds himself at. Naturally, this is a fine excuse to go visit!
They recently opened a huge beautiful bathing house nearby, but we hadn't brought any swiming gear so we just went in and admired it.
There's pretty much anything you might want in and around Sindelfingen, two large shopping malls, a pretty pedestrian shopping area, loads of restaurants and hotels, and it's very close to Stuttgart. So not a bad place to base yourself if you wish to visit the Stuttgart area and save a little money by staying outside of the city proper.