Almost all of these 1 star reviews are unwarranted. During the beta it was sometimes almost unplayable, but it's beta what do you expect. After the release it doesn't hang or bug out at all for me, the only issue I've had is low framerate from time to time but my rig is almost 5 years old now so that would probably explain that.
Overall the gameplay experience has been awesome, the reforged campaign dumps all over the original (aside from the illidan v arthas cutscene, the original was way better). There are actual humans playing this game as opposed to the original which had been completely dead for many years now. The other valid complaint would be custom maps but even that you can't really be too mad about, they don't want another Dota situation and I dont blame them. This game deserves a hell of a lot more respect than it's getting right now.
Say what you will about blizz and their slide (it's def not the same company that it use to be), but this game is well worth it esp considering the price.
Edit: Would probably give this 4 stars if it wasn't for the 1 star spam from all the sheep.