I've tried them on with flips, which looks really cute and laid back. I also really like the way they look with strappy heels and will wear them to work that way.
I think flats or flip flops work, but I also wear them with a pair of cute, round-ish toe (somewhere between pointed and round) pumps. That looks cute, too.
sorry, i am not much help. i have a pair in black and would love to dress them up, but so far have only worn them with flip flops. i have tried them with heels (just at home) but i always feel like i'm trying to dress up my pj's! any help with what sort of heels works with these pants would be appreciated!