its kinda broken, but its pretty much crack. I mean they admitted to releasing a poor product and let us choose a free game. I don't think its broken or slow in the way that you mean. There's some weird graphics glitch or tearing that happens with buildings from time to time. I don't think they nailed down how sims function, or they don't function properly - like if you watch videos they'll go to work and then come back and go to the first house available. They wont go back to their supposed houses.
I'm pissed that you can basically play solo with a region yourself but managing all the regions is tough because you have to load them. Thats a bit slow.
And there's no leaderboards and I don't think achievements are persistent. If you go to a new server you have to start all over again.