Like the others I have an Ender 3 with a warped bed. This helps alleviate the problem but does not eliminate it. Also, PLA sticks to it the same way it does to the plastic platform the printer comes with and I had no trouble printing with it. When it cools the prints will come off easily and any extra borders or skirting boards are easy to remove with your fingernails. It's a great upgrade, but it doesn't fix any manufacturing flaws in the printer itself. If you have a flat bed and your filament is already stuck, there's no improvement in this bed. If your bed is really warped a lot, you might be better off looking for a bed replacement or mesh alignment (google it) to fix your problems. The main downside is that the binding clips that come with the Ender 3 don't work. Layer and layer surface together have a thickness of about 7 mm. I bent one of the clips trying to hold them together. I've had and used other slightly larger binding clips, but if you don't have one on hand you can purchase a pack of different sizes inexpensively (http://amzn.com/B00006IBA2).
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