SAO started out well, but the later aspects of the story followed a different route than what was promised early on. You don't hear people complaining about Danmachi despite them being so similar, because Danmachi was both up-front about it was from the getgo and executed on it strongly.
Personally SAO is good for the first three episodes, then maybe you can watch to 12 if you're interested further. Any more than that though could be perhaps considered a waste.