I want to like this product but it's making it very difficult to do so. Installation was very easy and straightforward. The first print with it was going smooth until my filament spool got hung up and messed with the extrusion (not the magnetic bed fault). This is where my frustration with the product begins. If you're worried about adhesion don't be because you'll have to fight it to give up the print. As you can see from the first picture there are indentions left from where I was trying to remove my print. So if there are indentions on the underside then yes you guessed it there are now high spots on the print side. The other picture shows the white color it leaves behind after removal. I reprinted the failed print and let it cool for over an hour before trying to remove the mat from the bed to see if it would help with removal. Wellllll trying to remove the mat was a chore! It was stuck to the bed and lifted the printer as I was trying to pull it off! After some persuasion it came off. Now to try and remove the print from the mat. I did use a little hairspray this time to see if it would help. It wasn't as difficult this time but was still very difficult to remove. I'll do a couple of more smaller prints and see how it does but this thing will more than likely be going back or in the trash!

**update 1/9/21**
I'm revising my rating to reflect the great customer service I have received from the seller. I was contacted after my initial review and was offered a replacement. The second product worked better but still had some issues removing the magnetic bed with larger prints on it. I let them know how the second one worked as requested and let them know the issue I was having and was offered a partial refund and keep the product. That's great customer service!! I would consider buying from them again knowing they will back their product.

When I got the Ender Extender kit for my Ender 3, I also ordered a mirror bed that was "16x16" but actually was a quarter inch short. The issue with that was filament pulling out chunks of glass that was forever stuck to the bottom of models. Looking for a solution, I found these "3 Pack 16"x16" (400mmx400mm) Square 3D Printing Build Surface Heat Bed" and decided to give them a try.

I didn't want to stick it to the aluminum bed so I used the original clips that came with my Ender to attach one. That allows me to flex it to remove any prints. As it turned out, once it cools down the prints come off fairly easily and I've only had to flex it for a couple of stubborn ones. Adhesion is good. I have been using one of these for weeks and haven't had to clean it, or wipe it down with IPA. The surface is still great. I click "print" in octopi and forget it, usually don't even bother to check until the print is done.

It looks like I'll get months of use out of one of these, and I have two spares ready to go so I think I'm set for a year or more. That's good value!

My wife is a genius she put me on to this. Before I was messing up our bedroom with glue on the glass that came with my Ender 3V 2. The clean up is very easy and no mess at all. I don't need to use glue for the first layer to adhere to the print bed. The time between prints has been reduced drastically. I must say I am really satisfied with this product.

If your setup is correct, these are real nice. No problem sticking to this surface. Needs a bit more cool down time to remove part, but better than it failing mid print.ðŸ˜

Can be a little tough to get off but all I do is bend the plate to pop it off. I may have to use a scrapper to get the rest off or remove the residue on the sticker. But comparing to other stickers, this one is the best & I don't need glue.