I'd like to avoid it if at all possible. When I cut my hair though (on my head) I do use the trimmers on my neck and upper shoulder hair, since I get my hair (again, on my head) so short, it would look weird otherwise.

Upper chest hair is a bit long, might try it there at some point, but I've avoided it so far. Only other place that's long enough to even trim would be on the back of my hands and wrists, it gets shorter as it goes up my forearms h: Not gonna touch that though, for fear of it growing back in weird unless I keep trimming it.