I've used BlueStacks before and it's pretty useful. I think there are better emulators out there, but I used to use it to upload pictures onto my Instagram when I didn't have a phone.
I used to use it to play a certain game. I could've played on my former smartphone, no problem, but there were also menu's where you could equip another weapons, or a mount, pick or buy boosts, and something else. On Bluestacks, everything was nice, but on that phone, the images didn't show. I could still tap everywhere and eventually, if the weapon or mount was in my possession, I would've been able to see it, equip it, and read its description.
However, now I have a better phone that does run the game flawlessly, and Pokemon GO on Bluestacks with a Fake GPS app isn't really fun. So I uninstalled Bluestacks to save memory space on my PC. It's a quick install if I ever need it again, though.