I bought a 12-oz small for $2.59.
The shake has a decent pumpkin-ish flavor with just a hint of spice. I'm not sure how much I like it with the vanilla and chocolate of the Oreo shake though. The chocolate and pumpkin combination didn't quite work for me. I'd prefer one or the other over both.
The consistency of the shake was good--thick but not so much that it was hard to drink. The Oreo added a bit of graininess and were softened rather than fresh and crunchy.
Nutritional Info - Burger King Pumpkin Spice Oreo Shake - small (12 fl oz)
Calories - 500 (from Fat - 130)
Fat - 14g (Saturated Fat - 8g)
Sodium - 360mg
Carbs - 83g (Sugar - 66g)
Protein - 10g