Very nice and grand hotel, it used to be the Grand Hotel of Marylebone station. All grand, marble, palm trees (fake), gold, etc. We had an executive room which was one of the largest rooms I've ever been in and the bathroom was just glorious white marble all round. Only downside was that there were some stain on the footstool and on the carpet, in places. We could have complained but it was only minor so we 'survived' the 4 nights.
Very friendly and helpful staff and quite efficient. We ate at their various restaurants and the quality and service was very good; although on the pricier side. But it's clearly done to be a bit more exclusive. Certainly worth a visit, if for anything else for high tea in the grand central glass-covered hall. They have alternatively a harpist of pianist playing soothing music.
The pool and spa were also glorious, just a shame that the week we were there the sauna was out of order and apparently will need complete redoing.