Looks like EA received a smashing review for their Ambitions expansion by IGN. While it’s not perfect, it did earn a score of 8/10 (Impressive) with the following statement:
When so many Sims expansions have seemed relatively inconsequential, Ambitions stands out for how substantially it alters a key component of the game. The new profession system will doubtless keep Sims 3 fans busy for many more hours, and the other additions included will also give players plenty of new stories to tell for Sims both new and old. If this is the type of content we can expect from Sims 3 expansions going forward, content that evolves core game mechanics, color me impressed.
A rating of 5.5 for Ambitions is more like it. The novelty is going to wear off in a week.