Waterloo is a nice city with nice people.
After I wrote my first warning about being downtown at night - Waterloo has experienced more crime it seems like. During the daytime nobody has any problems.
However, at night time seems to be problem lately. Again, just be with other people, in the light and be aware of your surroundings and you should be fine.
Overall Waterloo is a nice town. I would advise anyone who is in downtown Waterloo at night to be careful.
It's probably like any other community but Waterloo does have some problems downtown from time to time. Just be aware of where you are and what/who is around you and you won't have any problems.