If you are doing a single magnet, these work great and are a good value. Though in our case, we were trying to do a paper doll type set of magnets and something about the polarity of the magnet sheet causes the magnets to "snap" into the particular locations when you stack them, so the clothes on our dolls don't quite align properly. For most customers I suspect this is a non-issue as they're doing single images and not stacking.
Like this? It's easy to order your own magnet sheets too 🙂