When I had to find a flight school for my son back in 2012, I spent quite a number of months on the web looking at nearly 20 flight schools in Europe (West and East) and looking at sites just like this one to see the comments. I didn't find any negative comments.
I finally selected AFTA and I can tell you that they are as good or better than the so-called big 3. I didn't regret it - my son had excellent quality training and he was well prepared for the assessment for a job afterwards. You can find cheaper ones but for quality/cost, AFTA is good. There are some other comments some years back that I posted in response to a query on this school.
I agree with ShamrockF - you'll be fine with them.