I am using windows 10 pro from 1 month found it very Fast simple & bugless.before it I had windows 8 on my pc & got irritated from it windows 8 was always used to hang & there are many bugs also thats why thought to install windows 10 pro & now I am happy with its performance.microsoft again included windows 7 style Start menu which we missed in windows 8 & now its start menu looks very good like win 7.its boot time is also very less comparing to win 7 & 8.groove music app is also very cool & ya last but not the least cortana app also good.i loved it very much.!