Awesome if you know how to use it
It's magnetic strength is very good. I'm using it to create custom made/3Dprinted socket set and wrench holders and it's just awesome to work with.
I noticed that on one side it's magnetic field is very strong (for it's size, obviously) and on the other is quite weak. This can be very handy if you're placing bits back to back, or need to isolate it somehow.
Also, it's so easy to cut with scissors that it just makes it a bliss to work with.
Don't forget to wash your hands afterwards, you don't want to scrub plasticised minerals all over yourself.
And don't try to bend it on tight corners. It has around of 3-5mm of min radius.