I ordered Clear Blue ovulation tests to show your 4 most fertile days. Previously I ordered the 2 days one but thought I would spend a little more for these. When I started using the tests I realised that I had been given the two day ones in a different box. I checked the serial numbers on the test packets and the box and they didn't correspond. The reason I know they were swapped is because I didn't get the symbol indication at the start of the test. Also, my test went from a circle symbol to a smiley face the next day. There was no flashing smiley face in-between. Obviously the product has been swapped into a different box so a bit more money could be made from each customer. I'm extremely disappointed as I have used this company a couple of times before and was really happy with the products, prices and delivery times. Won't be using it again and feel my money should be refunded at least.