This has been a great upgrade to our Phrozen Sonic Mighty 8K (now upgraded to 12K). It is so strong, much stronger than the generic mag plates from other manufacturers. Make sure to not fill resin past the max line on the resin vat, as adding the mag plate will add thickness and therefore displace more resin, and you don't want to overflow.
258 x 258 Flexi Plate with Pre-Installed PEX Build Surface (Bambu Lab)
At this price point, laser engraved plates are a must. Other than that, it is working fine for me.
I have 2, one on each of my X1C's. I have a P1P that doesn't get used much only because I need to get another WB for it. This is by far the best build surface I've used. Everything sticks, perfect first layers all the time, and I can get through 4 day prints without ever having to worry about any part of the print coming loose. I print all PLA at 62C on these and never have any issues.