i've got the Humax Foxsat HDR box and it works well, though ideally you need two satellite feeds as sometimes it gets confused and doesn't foce a channel change to record something with only one feed.
HD Quality is great and its got all the usual live TV pause, rewind stuff. I often pause a program on Channel4, then start watching it twenty minutes later to fastforward through the ads!
iPlayer is also good, though the initial menus can be a little slow. Might be the connection speed though?
I've replaced it with a Media PC now which does all of the above as well as freeview, bluray, music library, downloaded videos, 4od etc.