What I did: Today, I have started by doing some IPR (Interproximal reduction - removing small amounts of tooth structure at the areas where they contact; this gives us more room to move the teeth) on a few of my teeth, adding composite attachments (small pieces of tooth color filling material that allow the aligners to hold onto the teeth better), and finally fitted the first set of aligners in.
So what am I feeling: My initial feelings were that the aligners felt really tight. This is pretty normal as with each set of aligners, they will be placing slight pressure on certain teeth to move the teeth. My speech was slightly changed because of the aligners sitting on the tongue side (lingual) side of my front teeth. My tongue will eventually get used to this and I think my speech will be back to normal soon. Having to remove the aligners when I eat or drink (anything but water), is a little annoying, but not much trouble. These aligners are by far more comfortable than the metal braces I had before that were always scratching my lips. All of the things that I've been feeling have been expected. Now I can sympathize with patients when they go through it!
Progress: We'll see in a few days!