I bought one of these two years ago and since then have replaced the mat, cutter and ruler. The mat warped terribly even though I stored it flat. I live in Florida so it does get hot in the summer and we do keep our air warmer than most but it never got so hot in the house this should have happened. I checked some Fiskar mats at JoAnns recently that were hanging loose and all of them were warped. I am now using an Olfa mat that a friend had at a garage sale and it is great. The cutter didn't cut as easily as the Olfa one and I like the ergonomic version of the Olfa so I replaced it with that. The ruler I replaced this year because I didn't like the extra half inch on one side and one end of the Fiskar ruler and it was also hard to see the numbers on it once it was on fabric. I replaced that with an Olfa ruler that is frosted and love, love that one. Bottom line is I will never buy Fiskar quilting supplies again. Your situation as you can see is not unique.