Yesterday I got a "Digital TV DVD-T USB Stick" price £20.00
(Actually I got it for a friend and just playing with it as I type this)
(some stolen text to save re-typing, just in-case it looks familiar)
It came with a small rod aerial, but it's useless.
(possibly because of double glazing)
The little rod aerial would probably be OK in a strong signal area.
( I have the same problem when indoors with my SatNav and weak signals )
So I plugged my normal aerial into it and got 60 channels straight of.
( It came with a aerial converter, a USB extension cable and a remote control )
Other than that so far it seems quite good, but only time will tell when used away from home.