i have the thr10. i think it is a fantastic practice amp for home use, and it is just a practice amp. works well with an acoustic guitar too. jamming along with the ipod is perfect for learning new tunes. it can be quiet enough so as not to wake the kids up and just loud enough to piss the neighbours off.
i think the £250 price tag is a little on the high side but then i must say, i seem to be playing guitar more than ever since owning this. mine lives on the arm of the sofa so its ready to go all the time.
like anything though, its best to go and try before you buy!
if you do get one, don't turn on the noise suppressor which can be found in the editing software, it does weird, not nice things to the sound!