6/10
Sonnleiten-Rupert is a pretty normal apartment hotel with decent amenities. A bit old and worn, but still quite nice. Staff spoke only German and a dialect that was hard to undestand, but we managed. There is very quiet in the whole Bad Griesbach, which is more or less a kind of sanatorium. Nice walking/jogging routes and a small town nearby with a couple of cafés/ restaurants and a shop with limited offering. Not far from Passau and Austrian border, where there is a beautiful barock town Schärding worth to visit.
You need a rental car to make sight-seeing trips around the Bavarian countryside, which has great scenery. You must put the car in the garage. We did not visit the spa facilities and entertainment was very poor.