Like with car insurance, but if anything, worse. You just can't trust any of the breakdown companies not to stiff you if you just accept their renewal without checking it through and shopping round.
The RAC has just been caught out by the FCA for not telling customers what they were paying last year, when they renew. Naughty naughty. But they're all at it, in various devious and shape-shifting ways.
I've stuck with RAC long term but got alternative quotes this time from Green Flag (who tend to be cheaper but their 'model' is different as they sub out the actual breakdown callout service to local garages, so you're taking pot luck). Then went back to RAC and got their price down substantially.
I'm paying £286 on an 'any car' basis, for three family members, full bells/whistles. Includes unlimited continental Europe. I could get something cheaper but aside from the van we have several cars, one a 1962 classic, and I like to know everything's covered when I need it.