I like the expansion tiles. It almost feels as though they were left off so as to be made available as promotional offerings. They should have been in the original game, or at least made readily available.
I love that I can now play the game with 3-6 players but it is a shame that an expansion is required for 5-6 players. The rule changes to suit 5-6 players work very well and the games don't take that much longer.
I prefer the randomness of the dice to the non-randomness of the event cards. The special effect each turn doesn't really add anything to the game IMO. However, if some anti-dice player insists on using this, I'm up for it.
Several plays. I like Prosperity a lot as it made the game feel fresh. It changes the game a fair bit when played with the Platinum and Colony cards. Have only played Prosperity with a smattering of base cards so far.
Played once with 5p. A very nice expansion. I liked everything about it, except that the last 1 or 2 (of 15) master builders to get placed often had nowhere useful to go. Perhaps that's just part of the design. Whoever places the first master builder also plays the very last one.
Multiple plays. Least favourite and least necessary expansion. The ramps are quite tricky to get up and some players can fail to get up the ramps to the top level. Having another level is actually a bit gimmicky and doesn't add much to the experience. Using the ramps simply to make a mega jump is pretty cool.
This expansion makes play more gamer oriented than the original alone. However, it does increase game time noticeably, but it's still about 1 hour play which is excellent. I'm just as happy to play vanilla or with this expansion.