I loved the descriptions, and the transitions from one trippy scene to the next. And the way Spike manipulated Xander was lovely. Along with the totally-awesome-magnificent Spike-Is-Master part, this part is an excellent example:

"You're as high as a kite. I could plunge you into hell with a few well-chosen words, or I could lift you into heaven. Which will it be? Your worst nightmare come alive or a trip through the fantasy of your choice? Or maybe my choice.

The bickering at the end made it that much better, because I could really see Spike arguing with someone he's practically taken as a slave, and treating them in an a relatively friendly manner. XD

And a plus for tons of Eyes Of Spike. Happy mental images for me :D