Hey Joel,
I have found that I have lost weight and I have only been using them for about 8 weeks now. I find it really difficult to take out the new aligners when I change them every couple of weeks but it does get easier the longer you wear them.
The problem is that if you're feeling a little peckish then you have to take the aligners out, in my case donning rubber gloves because I cant take them out with my bare hands, then eating whatever you want to eat then having to brush your teeth and clean the aligners before putting them back in again.
To me, its just not worth it. Of course you can if you like, but then remember, if they're not in, they're not working... so if you want to snack all day then they are in and out, in and out. They should be in AT LEAST 20 hours a day. You think, 4 hours, hey thats loads, but it does go quite quickly and if you add up all the times they're out then it can be alot longer than you think.
Whatever works for you works for you but I do only normally eat 3 meals a day now...
