On the plus side, the hotel is all new, perfectly clean.
On the minus side, the door lock on phone gadget failed to work, requiring a change of room at past midnight, not the most pleasant experience. Out of a party of four, 2 of us had failed locks.
On the minus side, it looks like having some furnishing and pretend windows turn out to do a lot of work, which isn't available at Zedwell. The ambiance of being greeted by a lift with a "minus 4 or minus 5" button is... a bit strange.
Hearing the rumble of the tube every few minutes ... above your head (!) contributes to the really strange feeling one gets.
Not a bad place to go per se, and priced fairly according to the peculiarity of that hotel, but I'll keep that as a spare option going forward.