I did Columbia's GSAPP. I would recommend it only for the name on your (presumably) m.arch resume, not the experience. 

We were divided into small studios based on prior art experience and assigned a professor. These were usually architects working around town, not really trained in education in anyway. They each had an assistant from the current GSAPP program, who were doing this for some kind of credit. Mine was obviously not invested in anyway and actually made so many mistakes that we had to correct. It really impeded our ability to reach deadlines. The critiques were interesting, I liked the exposure to how an architect thinks. The prof we had was thought provoking. My biggest concern tho was that we were forced to model the traditional way. We weren't exposed to programming (which we'll need for m.arch) and it took hours and hours to cut and attach expensive materials together. I would've rather used that time to learn something related to rendering so that that knowledge could be further used in the future.