I'm surprised people have been having trouble with these shoes, I haven't had any problems with mine! I've been wearing these shoes every day for the past 6 months or so and they are officially my favorite internet purchase ever. I personally have had no trouble with the zipper and if I would have had trouble, I would've sent them back immediately. I'm not the richest person, so spending 60+ on shoes was a big deal for me. The shoes are TRUE TO SIZE, so try to order your exact shoe size. I'm actually going to purchase a back-up pair for when the pair I am currently wearing end up dying. I was heartbroken during the winter when these sold out and I couldn't buy my back-up pair then!