The first week was an adjustment. The Geli Beads feel very different from traditional foam or springs. I almost returned it. By week two, the beads seemed to conform to my body differently somehow, more supportive. By week three, I was sleeping better than I have in years. My Apple Watch sleep score went from 'Fair' to 'Good' consistently. I wish Geli had set the expectation that there's a break-in period.
[UPDATE - 3 months later]: Still sleeping great. The mattress has only gotten better. Considering upgrading to 5 stars.