This has been a helpful thread for me. I'll be returning to Madrid in a couple months with my wife and four-year-old. I am debating between the Westin and the Palacio del Retiro. The Westin looks like a good deal in cash and lousy deal in points, the opposite is true of the Palacio.

Here are the factors I am weighing:

-Does one have clearly better service than the other?
-Does one have clearly better (larger/more comfortable) rooms than the other, considering there will be three of us?
-As an Ambassador Elite, do I have a significantly better chance of a meaningful upgrade at an upgrade at one property or the other?

Any advice would be greatly appreciated.