They rely soley on contractors unlike RAC/AA so their response times can be quicker as garages will give them preference, but they don't do so many roadside fixes, more likely a tow to a garage. When I was looking around RAC were cheapest, £40 for roadside/homestart which seemed pretty good.
Just to give some balance aswell though, a girl at work was left for 3 hours at the roadside with her 8-month pregnant sister by the RAC, it was a kindly AA patrolman who towed them to a service station so they could get drinks etc. And we both work for RAC
i'm with the aa roadside relay, costs about 80 odd quid and been with em for years but never had to use em, trouble is if i left you know for sure the car'd break down!
anyway to make this post have a point, me dad's got the same and he's used it a few times with no problems at all, last week he managed to lock himself out of his van and they turned up in less than half an hour