If you've never had tea in a hotel in London, you will probably enjoy this experience. If you have had the real thing, though, there is no comparison. The sandwiches are dry; the service is sloppy; the presentation is very American - instead of the food being served on a 3 tiered tray, it is served on separate plates.
You will probably enjoy it, though, if you have no point of comparison, because the sandwiches and scones are okay, as far as what you usually get in American restaurants. They are nothing like those warm, buttery, sweet, soft scones in the UK, and the sandwiches don't begin to compare with the soft, melt-in-your mouth, delicate bread that they are served on in places like Brown's or Claridge's.
So if you're looking for an authentic experience, this isn't it, but it is an enjoyable way to pass the afternoon, if you're not expecting the real thing.
Cheers!
Heather W