It seems to be one of those "Your Miles May Vary" types of thing. I can eat/drink products with aspartame all day long and never have a problem. No cravings, no stalls. The only way to know how it affects you is to try out products that contain it and see what happens. If you start getting cravings or you notice that your weight loss is dramatically slowing down or stopping completely.....

It should also be noted that some don't like aspartame due to the health issues that it has caused in a small amount of people. Do a search for aspartame and you'll come across many debates about the subject.