I Am a Android Developer and to test my apps I use bluestack but it is the worst android emulator ever and I am just using it becuase I am not able to find any other great solution for it. First problem is that it keeps installing useless apps and games and due to this even the overall working of my PC is getting worst day by Day. Secondly Sometimes there is a huge crash problem.in it, all the apps u open in bluestack will get crashed again and again and this continues until u restart it.
Thirdly it is very slow normally, it takes around 5 minutes to load even I am having a 60k laptop with 8gb of ram and also I maintain my PC well. But still 5 minutes is normal waiting time.
Fourth problem comes about the permission of apps on this emulator, bluestack is not rooted emulator so many a times u will face this problem when comes to permission.
I would not recommend Bluestack rather I would say to go for DROID4X android emulator as it is best and also comes pre rooted