Updating as a few users were considering getting them. They feel a bit weird but I can talk fine. No pain just slight pressure. I have to wear them 22 hours a day and take them off to eat and drink. DS age 4 couldn't tell I have them in, DD age 7 only when looking very carefully! I have 5 sets of trays to change myself at home every 2 weeks so don't need to go back to the orthodontist for 10 weeks. Looking forward to the results already!