I have one of these...
and I love it. The image quality is astonishing.
One thing not made clear in the review, is that low power standby (the default mode) switches off the UHF passthrough, so you can't watch TV when the Humax is in standby, unless you use a UHF splitter instead of the normal passthrough. It is a fairly easy task to switch to standard standby mode, which leaves the passthrough working, but it will use more than 0.5W.
There is a beta of the firmware upgrade available now to fix the search issue, plus a few other niggles, like the HD sound is at a lower level than the standard def Freeview sound. This will be downloaded over the air later in October.
The upgrade to open up the TV Portal is expected in November. This should also enable BBC iPlayer, internet radio, Flickr and a few other services to be available on your TV.