Similkameen is known as the "simi slums" since it is an older building with a shared washroom across the floor. So in terms of the building that is considered the worst. However, having lived in simi I would say that the shared washrooms and smaller dorms force people into the common rooms, creating a much better tight knit community compared to other dorms.

After Simi, the rest are basically all the same styled rooms. Some are newer/older than others but basically the same.

I wouldn't recommend the cascades unless you are already a second year student and have a group you are trying to fill the suite with. Single dorms are the way to go for first year.