It is highly unlikely that anyone will have studied/flown at all of the schools that you have listed. The best that you can hope for is that various people will tell you which school they used and whether or not they recommend that school. In all probability some of the people who post will pretend to be student pilots, but will actually be employed by or in some way connected with the school that they are recommending.
At the end of the day you must find the school that best suits your needs. A good starting point might be to check whether or not all of the schools that you have listed are actually approved by EASA.