Tried this for the first time today with my family (who are pretty good at games but fairly casual, so a good audience for a game like this one). We liked it a lot. One of the best things is that there's almost no setup and teardown time at all, compared to some other games that have long-ish scoring routines at the end. (Dominion is already pretty fast for scoring, and Greed scores faster than Dominion.) That makes it very tempting to jump right into another game after you finish one. There's a decent amount of variety between games too, so that's another incentive to try another one to see what you get.
It doesn't really scale like 7 Wonders does, despite also being a drafting game with simultaneous play, because resolving your plays is sequential, and because Greed doesn't always limit direct interactions to adjacent players the way that 7 Wonders does. Despite that, one of our games was with 5 players (the maximum recommended) and it didn't drag.