I have been buying and selling on Mercari for roughly a year and a half. I switched over my listings from Poshmark due to their excessive commissions and, at the time, inability to offer buyers free shipping. I haven't looked back since, as Mercari facilitates transactions smoothly and payment for sales is quick and easy. One thing I bought got lost in the mail and Mercari was quick to refund me. Things sell really fast on here too, which I love. I've had items sell within 5 minutes of listing them. Mercari frequently offers coupons as a way to drive sales, and this works great for both buyers and sellers, as sellers still get their asking price and buyer gets to save some coin. As a buyer, I have no complaints. As a seller, my only complaint is the recent revocation of the ability for sellers in the state of California to apply their balance towards payment of goods on Mercari. CA sellers are now forced to withdraw their balance due to "compliance"(Mercari's Twitter explanation). Mercari would have gotten 5 stars from me if not for that.