You can find the placement on the website. They list students name and where they were placed. It is not unclear.
Someone said above that they fail 50% of the cohort. I would say that it is very optimistic. This year they failed 2/3 of the cohort. I can confirm this.
About the program, it is very demanding and will be very hard to find a program with the same level of econometrics as UC3M. Regarding Macro and Micro training it is very standard, but econometrics is very tough because it is the main field of the program.
With respect to the scholarship, 900 euros is more than enough to live in Getafe, even going to a bar all weekends (pretending you will have time). However, if you want to live in Madrid it will be a bit problematic.