the weekend the ivy opened, i stayed at the westin but asked for a tour of the ivy. while the gym/health club in the ivy is great, the westin is a much nicer property in terms of guest rooms, etc.
i found the rooms/bathrooms at the ivy to be very small and oddly laid out. the westin is really great. i am going to reserve further comments on the westin since there is an existing thread on the property.
the properties are within walking distance to each other.