I bought a Humax box recently (£150) and had no problems installing it apart from understanding which cables to use. In the end I just connected it up to the tv with two of cables supplied and changed one of the settings as suggested on the screen.
Apart from that it does it all itself. Navigation around the menus is different to sky but easy enough.
I don't seem to be getting HD yet but am not being picky about that as the standard quality is excellent. When I get my head around it I will try to sort out the HD.. I must be getting on

as all this technology puts my head into a flat-spin. I find that if I let the instructions filter slowly into my mind then I usually get there in the end.
Programme choice is ok but I could do with less of the regional variations , s'pose I could delet them but it is handy sometimes to look at local news for somewhere else, especially the weather.
All in all am pleased with it as it's a lot simpler than sky and has less of the "crappy" programmes.
do it now