While the domain LifeHacker is unfortunate, and will obviously make some people flinch, the Android Emulator itself is fine.
Just download it from Google instead of a 3rd party site, as well as all the instructions you need to get it going.
You should be aware that the Android Emulator isn't perfect.
I've been developing my Android game for several months now, and although the Emulator can give you an idea of how your app should look and work, a lot of time you need to upload to your Android phone to see it working properly.
I should mention that for most of that time, I didn't have an Android phone, and had to rely solely on the emulator to test my game.
It's also a lot slower and unless you have a touch-screen PC, you're going to lose much of the functionality, so it's not quite what the term "Emulator" suggests.
All I'm saying is don't expect it to be an emulator in the MAME sense.