I got a Topfield TF5800 a couple of years or so ago, and have almost forgotten what TV adverts look like. On the few occasions when we watch TV live I really resent not being able to fast forward the ads!
The standard user interface on the Topfield is pretty dire, but it's very configurable and with a little bit of tweaking you can set it up to suit you Installing MyStuff
and setting a few options completelely transforms it. If you are more geeky then there are loads of add ons too. Have a look at www.toppy.org.uk
for more info.
I did have a hard disk failure, but tech support was excellent even after I had buggered around trying to fix it myself.