My roomate installed this program called classic shell i had a few ? about it

I see You

Jan 2, 2014
WA state
Hi so i came home and clicked on my start button thinking i was going to get my usual start screen instead i was greeted by this menu i was like WTF so i asked my roommate about it and he said oh i fixed it, i installed classic shell at first i was pissed off then after looking at the amount of people that use it i was wondering if i should keep it installed or is it going to add just more clutter to the all ready things that start, will it interfere with my gaming at all? So on that note let me know who uses it here and should i just use Revo uninstaller and 86 it.