Really don't know how many build surface types and brands I've tried but I've finally settled on this one.
I've only bought a new surface to be ready to replace my first one, that I've done hundreds of hours of printing upon, but as yet the original is still doing its job.
I have to admit I nearly always use rafts because I hate the anxiety that a print will detach mid job, but I've not had a single print come loose when on a raft with the Ziflex, and I've also done a number of large flat prints non rafted that didn't detach either.
No build surface is perfect, but this is the best one I've found so far.
High Temp Ultimate Upper Surface
Durch die sehr feine Oberfläche ist perfektes Leveln des Bettes nötig.Dann haben bei mir alle Materialien (ABS,PETG,PLA,PLA+,ASA,PLA-Wood) super Haftung.Einen Stern abzug,weil die Oberfläche (vermutlich durch das Verkleben mit der Magnetschicht) stellenweise nicht Plan ist und weil es durch die Fertigung der Oberschicht minimale Längsriefen gibt.
I started with the 'High Temp Starter Kit' in June 2020 for my FlashForge Inventor and I'm more than satisfied with this concept. However, I use a glue stick (UHU or Pritt gluing stick) to ensure the most perfect adhesion. The 'High Temp Ultimate Upper Surface' was only ordered as a replacement 'in case of' but I don't worry that they will ever fail...