How to find good CBE centre in london? anyone experience?

Does anyone has bad or good experience with any CBE centre in london????
I have been searching web like really long time, but I couldnt find any CBE experience share!
I have booked F1 CBE in hammersmiths for £60 without extra charge
(Iam external student).

But I tried in ealing and they asked me to pay extra £25 becuz I am not a student from the college.

I am thinking to take F2 on july at kaplan in hammersmith.
does anyone have experience with that college??

does it really matter where I take CBE?

I have seen some small college they look like really unprofessional, and disorganise!

I need helps please 🙂