Completed a 5 night award stay at the Alfonso XIII last week as part of a trip to Spain. Sadly, it doesn't seem they're being as generous with upgrades as they once were; as a Titanium I received a one-category upgrade to a Deluxe room; they were still selling several higher categories when we checked in. I should have asked if anything better was available, but I got a little confused about the room categories and thought we'd gotten one of the rooms with a terrace.
Amenity breakfast was the full buffet -- which as others have said, is very impressive for a European hotel, with someone to please just about everyone. We enjoyed it a great deal.
As per
acrophobia 's review above, we also got a nice welcome amenity of chocolates and sparkling wine on the first night, a bottle of another local wine and cookies on the second night, and a cologne spray the final night.
I did find the staff to be a little curt on a few occasions -- for example, when we checked in, they gave us details about breakfast (including showing us where it was and writing down the hours) but apparently forgot to give us coupons. When we got to breakfast the next day they took our room number and nodded, and so I was surprised to get a check for the full price. When I mentioned we'd selected breakfast as an amenity, they were very insistent (almost to the point of rudeness) that I sign the folio and go to the front desk to resolve the issue. At a Luxury Collection property, I would expect a bit more grace; would it have been so hard to phone the desk quickly and confirm? It was eventually resolved by the front desk, but left a bit of a bad taste.
I also found the bathroom in our room to be disappointing. In particular, the bath made for a terrible shower; it had a nearly useless glass half door that leaked profusely, a rain shower head mounted far too low, and a hand shower that couldn't be raised to a reasonable height. The leaking water ends up on a polished marble floor, making for a slippery mess when climbing out over the high, contoured walls of the tub. We eventually ended up having them bring two anti-slip mats (one for the shower and one for the floor) which improved the situation a lot.
Despite those quibbles, we enjoyed our stay a great deal -- it's a lovely historic property in a great location in Seville. I wouldn't hesitate to stay there again, though I would probably be a lot more proactive about trying to get myself into one of the suites with a separate shower.