The good:
-The food is high quality. I ate chicken salad and a cup of the daily soup (a squash bisque), and both were excellent. I also had a special house blend of tea, which was also great--which you would expect from a place like this
-Service was on point
-The decor was in keeping with the Victorian theme...I think. I wouldn't really know because...
The bad:
-Dude, you HAVE to get a reservation if you want to sit in the main dining room. I waltzed up on a weekend afternoon around 1 or 2 and couldn't get seated inside. I was relegated to the patio with other diners who didn't know better either, and by the time I was done eating, I heard the host turning people away altogether unless they were willing to wait for a 4pm afternoon tea seating.
The ugly:
-Actually, I wouldn't call any part of my experience here truly ugly. However, since the parking lot is also for the museum and Clayton House, it can be tough to find any and that may be very frustrating if all you wanted to do was eat at the cafe, and especially if you have people with mobility issues because it's in-set from the parking lot and street a fair ways. So, be sure to arrive a fair bit earlier than your reservation or be prepared to walk if you can only get street parking.