Specialist Learning Providers

My son is nearly 17 and has high functioning autism. He is badly traumatised after suffering several years of being bullied at secondary school. He is currently attending a centre that specialises in the recovery of bullied children. However, he is not progressing there and it has been decided that he needs a specialist autism provider. The LVS Hassocks learning centre in West Sussex is a possibility. Does anyone have any experience of this provider?