Bisley Probation Training Feedback

I'm currently trying to chose between joining the NRA at Bisley and paying £500 but getting full membership sooner with a very formalised training programme or joining SERC or Croydon who have a minimum of 6 months but I work in Bank and live in SE London so they very convenient.

Am I wrong to rush? I am just conscious that on top of waiting for my membership to be accepted and going through a probation I also then need to wait for the FEO to get back to me (which luckily in London is only 2 months). It all adds up.

If anyone has been on the course I'd love some feedback or anyone who did their probation at SERC or Croydon.