Crazy how much 15% changes

I started pickpocketing the different faction elves in Priff using the thieving aura for +15% success. And was happy with the xp and loot as an Ironman… tried again after the aura expired and was busted back to back to back and was done with the 3 factions I can currently pickpocket in like 2 minutes from like 20-25 mins I would get with aura.. I know it’s a decent chunk but just was surprised how much of a difference it really makes. It’s not even worth it without aura XD.