To resurrect this topic, given these preferences:
1) Want to be in the center of it all -- hotel quality itself is not as important as location and safety.
2) Don't want to walk a lot.
3) Don't plan to do much except sightsee only at major sights...
Would Marble Arch or Grovesnor be the best choice (given I'd like to stay at a Marriott)? That's my read of the comments above but just would like to make sure. County Hall seems like it would be a third choice.
Thanks,