I ordered 4 of these fish, and initially asked for 1M3F, with a slightly delayed shipping date, and Flip was happy to accommodate. Then I changed my mind on the sex ratio, just emailed, and they updated my order (which hadn't gone to be packed yet) with no trouble at all. They were shipped overnight but unfortunately 2 of them - 1M and 1F - arrived DOA. I don't have a lot of experience with mollies so wasn't sure if this is typical for them in shipping or not. I emailed with photos per the policy and Flip refunded immediately and with an apology and sympathy, which was really nice. The other female was a bit listless and died a couple of days later, sadly. She mostly hung out at the bottom of the tank and then just passed. However, the surviving male is absolutely beautiful, curious, playful, and has taken up swimming with my tetras and cories until I get him some molly friends. I would definitely order again as I suspect this was just a weird one-off occurrence. It just made me sad!