Here's my perspective after hearing & owning some Kimber Kables:-
I think that Ray Kimber produces some good cables for the money. They are reasonably expensive (!) so that the buyer feels that he/she is not buying zip cord & feels that he/she has reached some status of being an "audiophile" but they are not so expensive that they put the buyer off. I'm thinking of the PBJ, Hero, Silver Streak, 8TC, 4TC, 4VS & 8VS - no experience w/ the new Tonics. All very good for the money spent.
Additionally, as Rockvirgo pointed out, Kimber's been in operation for quite some time when we didn't have all the choices that we do today so many/most dealers stocked Kimber when they discovered that they did more things correctly than incorrectly.
Sure there are others that will beat Kimber but the money outlay *used* to be much more. Today, it's quite different! Kimber still represents good value for money but his competition is fierce.