I started with Invisalign 9 days ago and was sent home with the first 2 sets of liners (out of 33). I experienced zero pain or sensation with set #1 so decided (on my own!) to switched to set #2 after 5 days. I experienced zero pain or sensation with set #2 so asked if I could move to the next set earlier. They told me to leave set #2 in for the full 2 weeks, but did move my appointment up by a week. I have the following questions: 1. Has anyone found that there is no pain and barely any sensation when wearing their liners? 2. Has anyone been allowed to switch sets earlier than the standard 2 weeks?I'm kind of feeling like 'no pain, no gain' so why not accelerate things a bit.