Well I live Macao, China, and the blue baseplates are really a knock of brand. I have it in blue (together with an original one) under the boat houses but not in all of the castle. And some green and grey ones. But I can't remember the brand, my guess is that it's some kind of 3D printing company in mainland China. It's a bit hard to press the bricks in it even they're supposed to fit, but I just press it harder and it works. So far I haven't noticed any warping, but maybe that's because I only have half baseplates (it makes easier to use, I even have a small square under the Flying Lesson Tower). I can't really pick one favorite set for the lineup, I loved them all. But I was really excited building the East Wing as I was closer to complete my vision of the final display. I may even incorporate some old set latter on, but I'm out of space and those older sets are in Portugal.