This week I got a pctv "nanoStick T2" USB DVB-T/T2 decoder for my PC. I plugged it into my ancient Debian desktop box running Wheezy and the kernel detected it at once. Kaffeine works out of the box, but VLC and SMPlayer both needed the
dvb-apps package installing and a manual tune running to give them a channels file to work from.
We have direct line of sight to a major transmitter so even the little indoors aerial works quite well. I may still install a loft aerial to improve things mostly because the supplied aerial doesn't stick very well to wall paper - it wants a nice shiny surface like glass!