Solaire's air chambers will continue to expand slightly for 24 to 48 hours after they've been inflated for the first time. So you may notice that your sheets are a little loose for the first night or two.
During the first few days, while the chambers and other components relax and stabilize, the comfort level readout may fluctuate from what you originally set. Simply tap the memory button on your remote to bring it back to your preferred comfort setting. This will resolve within the first week.