In comparison to the emulator, Blue stack is an F1 car, while the emulator is a Model T...
I must say that the interface has still a lot to go... But the apks I've tried so far work very well...including the admob bar!!!
The biggest issue I encounter so far, is that, Android devices were designed to be used with the fingers, enfase in the plural of finger!
so making multiple-touch gestures as zoomin is impossible with blue-stacks, at least on a "normal" desktop...
Overall, a good Idea, very fast, but still feature-poor