The Peterhouse admissions staff are really great, so you should have a good application experience if you go with them.
I also remember hearing that there were some issues with sexual assault in Trinity Hall and the complaints not being heard. There was a staff change, but it might be worth avoiding especially if you’re female (I am, so my mum said I wasn’t allowed to apply there).
Full disclosure: I applied to Peterhouse(so I know a lot about them), got pooled but rejected. I also got 3 A*s and an unconditional offer from the 2nd best uni for subject, which makes me only mildly annoyed at them.