are they worth it, and how well do the standard ones work, and are the alco ones 6 pot or 4 as are the standard ones cheers for any help well appreciated.

 

Are they worth it = yes
How well do the standard brakes work = Depends on what you have, i had four pots and they are nothing compared with the alcons.
Are they 4 pots = Yes

With that said it really depends on what you are using the car for, but for a breaking upgrade IMHO they are good, you should be looking at around 550 for a second hand set. Alternativley you have bremdo, Ap, Godspeed.