This is a nice, reasonably-priced product that should meet expectations for most people.

We bought this product hoping to hang a completed puzzle, especially since the product description on Wayfair said it could be used for heavy and/or thick materials like poster board, foam core, heavy card stock, rugs, etc. Unfortunately, the magnets were not strong enough to hold the puzzle, so we ended up using Gorilla Glue to attach the puzzle to the frame. It's still somewhat workable, but obviously prevents us from changing out the display piece in the frame in the future.

If you plan to use this product for a regular poster, you should have no issues. For some of the heavier materials advertised, though, there's a decent chance (at least based on our experience) that it may not work.