We've just bought this box and was surprised by the quality. First, they supply the HDMI lead for high def viewing. Easy to install, and after plugging in the power, dish, HDMI and optical sound for 5.1 surround it was a simple 6 step set-up to get the channels set up that revolved around waiting for it to scan and then press OK and telling then my post code.
Picture quality is great, even when upscaling SD programmes to 1080 resolution. The HD picture is crisp and clear as you'd expect. I haven't seen a single blemish or pixel in the picture yet and no signal problems like with my old freeview box.
Sound is clear and crisp. The 5.1 works really well and can't really be faulted. Some of the older shows don't play in surround but that is only to be expected.
The channel selection is much bigger than freeview and took only 30 seconds to find 137 TV channels and close to 100 radio stations on top of that.
Overall, this is an excellent box and you definitely seem to get more than you pay for. Very highly recommended as a half way point between freeview and sky or virgin.