is the game really that good?
It's pretty fun. So far all my battles with friends (Muzy and David) have been entirely lag-less. Online battles with strangers have only occasionally had one-second lag, and I don't know if it was domestic or worldwide that I did. Online seems to lean more towards Mario Kart quality than Brawl, which is a very good thing.
I've only played one other fighter (MKvsDC, for a few days), and right now my skill level is really low - I pretty much just have a regional understanding of what does what. Any sense of direction and combination is yet to come.

I'll be going over the manual more thoroughly after my weekend college assignments are done.