Day 1 and 2 was a lot of pain. Unlike a lot of the reviews I read I got the buttons on on day 1. They glued a set of trays onto on teeth and had to pull them off and that left the buttons on. My teeth are super sensitive now from it and I got buttons on my front teeth which makes me really rethink this but I'm paying for it either way so may as well just suck it it. My tongue has a big cut on it and was bleeding from the tray as well as my cheek and the inside of my lips. I've learnt to get a small plastic baggie with ice and just rest it on my face to help the pain. It's a pain when you live on the run but it also helps you to slow down with life. Still learning how to clean these the right way where there's no smell to them.