Just got my first set of aligners today. I really don't know what people were complaining about, it was pretty easy to put them on and take them off. Though it feels REALLY uncomfortable wearing them, most likely because im not used to this. It's not necessarily painful, just really irritating! Im crossing my fingers that my teeth will be straight by the end of this.. Updated on 5 Jul 2011: On my 16th set and I'm really noticing some great differences. A huge difference already, just have about 10 sets left and can't wait to finish this up. Totally worth it.