ADR Licence. Is it worth the time & money?

Hi all,mine was renewed before Christmas our firm puts us through but only packages ,I had to pay £150 for my tanks out of my own pocket to add onto my card ,I have always had t&p on my adr ,if you want to add class 1&7 you have to go to London to a specialist training company which cost a packet ,we do multi drop carrying all sorts ,the only downside is we got to pay back the money if we finish with them cheers John