May 19–20 (1 night)
Room upgrade: Yes. Booked Superior Room and was upgrade to Deluxe (a slightly larger room according to their website)
Early checkin: Did not use
Late checkout: Yes, checked out at about 3:30pm
Daily breakfast: Breakfast buffet ($38 per person) in the Garden Court
Special amenities:

$100 food and beverage credit used at the Garden Court for cocktails and at the Pied Piper Bar for food and drinks.

In addition to the above, we were offered two drink vouchers ($15 each) or SPG points at check in; We took the drink vouchers. I thought this was very generous as SPG gold only specifies "a free drink."

We also had free in room internet during our stay.

We had a little trouble getting credited for the full $100 food and beverage credit, but I think this was due to our final charge from Pied Piper showing up on our folio at around 2:30pm on day of check out. I emailed their accounting department and they credited us the difference later in the week. All in all, we got a little over $200 worth of value out of the FHR ($176) and SPG ($30) benefits.