It was alright, but it had the potential to be so much more. An example, a +5 leg is just as good as 5 +1 legs. The game was supposed to be based on the evolutionary process, and yet, that process played no real part in the game. Also, once past the initial stages and in the tribal stage, it played like a second rate strategy game. To be honest, I got more enjoyment out of the creature creator than the later stages of the game. Now don't get me wrong, Wright has done some great work in the past... Sim City, the Sims, etc., but EA's fingerprints are all over Spore and the fact that Wright sold out rather than sticking to his guns to make the game he promised is evident in the final product. Now I know there is an expansion pack coming, so that may have add whole dimensions to the game that would change my mind, but I can't see spending even more money on a game that lost its replay value too quickly. SimCity and The Sims both had excellent replay value, but Spore got old quickly.
And I stand by my statement about Sid Meier. His games are vastly superior to Wrights and provide way more replay value than Spore could even think of. Civilization, Pirates, Railroad Tycoon, and the rest all provide nearly infinite replay (admittedly so did SimCity and to an extent, The Sims, but you needed expansion pack after expansion pack) value.
This is just my opinion, but I have been playing these games since the late 80s, early 90s. Now I am probably biased because two of my favorite games for my C64 was Pirates and F15 Strike Eagle (with Silent Service and NATO Commander in the mix as well). I know I am coming off as a Sid Meier fanboy (and I guess I am to an extent... I will buy pretty much any game his name is on or he had a hand in) and I do want to acknowledge that Will Wright made some great games as well, but Spore just wasn't up to his previous benchmarks of quality.