I have to stand up as a supporter of DAB (although I do wish that the UK had settled on DAB2, or even better 2+).
We have a Roberts in the kitchen, fantastic as it mounts under a wall cabinet, thus doesn't take any worktop space and the sound is spot on (I sue it mainly for Planet Rock, which I listen to whilst cooking).
Mrs T has a Fiesta with a DAB in, though that car doesn't go any further than Darlington, she has no problem with drop out or sound quality.
I have (as you may have noticed) just recently bought a CMax and I have no problem listening to 6Music, R4, TeamRock, Planet Rock whilst travelling from NTR to Swansea, only losing the signal, albeit briefly, on the roads where there are high hills/mountains either side.