The sous vide stick works great.  I just stick it in a large pot of water with jars of pre-yogurt (2+ Tbs of prebiotic, a couple tablespoons of yogurt or probiotic pills, and the milk/cream/half-and-half) and set the temperature and let it do its thing.  It works great and doesn't take up much room in the cabinet.

I like a tiny bit of sweet, but I agree normal store yogurt is way too sweet.