I use these cables and am satisfied with them. I have five connecting wall sockets, two FM tuners, a video/DVD combi and TV. I think they are a little on the expensive side - so I bought mine when I was at the London hi-fi show last year to get some discount.
They certainly improve on any coaxial cable I've made (with parts from Maplin). Particulary noticable with the tuners was the treble, its much clearer and sounds more extended. Has helped improve recordings of radio programes. Picture on the TV much sharper and 3D-like. Also helped reduce some of the interference I was having.
Recommended.