I've had it for some time now (got it in time for the cricket) and it seems to perform in exactly the same way as my old OnDigital Nokia box: needs a very strong signal, amped up here; all ITV broadcast signals are liable to dodgy reception and break-up from time to time; it gets moody and wants a reset from time to time for no reason (Nokia, press reset, EyeTV take out, put in USB).
Otherwise, it's near-perfect, except that you'll get a disk-full of recorded programmes to "watch later" unless you're careful.
Nick