OXO Good Grips Non-Stick Pro Oven Tray 5 "Best oven tray ever!" 12 March 2017 Yes, roast potatoes cooked well, slid off and easy to clean. My only disappointment (my fault) - didn't realise they were not dishwasher safe. Wouldn't have purchased had I realised, but going to give them a try. Having now used the oven tray quite a few times have changed my review from four to five stars, I am so delighted with the results every time I use the tray and washing it is no problem because nothing sticks! I am now going to purchase more items in the range as my other oven trays are not up to this standard.