We had the Yellow Room with the en-suite bathroom, which was very good. The alternative Pink Room shares the bathroom with host Larry.
Larry is an excellent host, making different tasty breakfasts each of the three nights we stayed there. He gave us loads of information on places to visit and restaurants to eat at. Nearby Italian restaurant Mama’s On The Hill and Brazilian restaurant Brasilia were particularly good.
The Missouri Botanic Garden is just a short walk away and is definitely a must-see place.
Overall the Inn on Castleman is a very good place to stay for a visit to St Louis.