As always, full reviews and photos are in the respective master threads:
Matild Palace was likely my favorite as it really had no issues and was a very comfortable and pleasant experience. The W was also very comfortable with an amazing truffle eggs royale, but the upgrade upsell attempt was off-putting. The Marriott had great views and great design and great macarons, but I want them to update the beds to be a bit more plush.
I thought all of these were better value than Parisi Udvar, which was nice but seemed overpriced.