We are in catchment for Trinity, and whilst I've heard great things about it, when we went to view it 3 years ago, a couple of things made me wary.
Firstly we were told that it was very likely that there was going to be a P1/P2 composite class in my DDs intake, 5 P1s would be put in a P2 class with 2 teachers. I just don't like the idea of composite classes and did not want to risk my dd going into that class.
Also, when we went to take a look around, a french class was being held in the corridors. Table and chairs set up with a teacher right outside the loos, and effectively blocking a corridor which was a potential fire exit. There were bags and all sorts of mess lying all over the place as well.
The playground was also a mess, with a fenced off (not very securely either) area of rubble. This lay like this for almost 1.5-2 years. The playground has since been refurbished and looks great, but it looked a bit of a deathtrap for a while if I'm honest.
I know these 'issues' might sound petty to some, but it put us off and we decided to send our dd elsewhere.