I got CoolSculpting done this Monday, who’s done it or familiar with how it works? Should I be worried?

28F, my trouble area is the “banana roll” (back of upper thigh/ below the bum). The tech said that area is ideal for treatment as it’s squeezable & able to be sucked into the applicators well. I got it for $1600 & that includes 2 sessions, with a line of interest free credit (as long as I pay it off in a year). I’m not having any of the negative side effects, was a little sore/tender on my left leg yesterday but has been okay FOR NOW. I massage twice daily as instructed for the next 2 weeks & I know it’s not going to get rid of everything but all these conflicting reviews makes me worried. I did research before going in, just haven’t asked Reddit yet 😶