I love magnets and magnetic attachments, and have several MagSafe attachables for my phone. This is easily the strongest by far, and I'm absolutely confident that it'll support the weight of my phone (or an Action Camera etc which I don't own) whilst being on the move.

Pro Tip: don't try to separate the plates by pulling them apart, it's quite difficult. Instead, twist them against each other, and when the magnets are misaligned, then it's easier to separate them.

Oh yes... it has magnetic alignment! So even though one plate is supposed to be behind your clothing, etc, it's simple to align because this will clamp to it squarely, thanks to the four magnets in the corner! Great designing and thought process there.

The front-plate has the standard Action Camera mount, but you're also supplied a mobile phone clamp for it. There's also a couple of stick-backed metallic plates (and a rubber one too) so you can stick them to your car dash or whatever to mount your phone/camera there. Simple and thoughtful.

And finally there's two lanyards, one neck-sized and one hand-sized; this is the only curiosity about the whole package that I have? The neck-sized one is clearly for the backplate, because in the absence of the front plate, it's just going to fall, right? So you strap this around your neck.

But that only leaves the front one for your hand for the front plate... however I plan to use this to hold my phone on rollercoasters, etc... and I'd want the front plate to ALSO be secured around my neck in case it becomes separated for whatever reason.

I guess maybe they expect you'd already have a neck lanyard for your device so you don't need a second one for the magnet that it's attached to? I'm not sure, but in either case, given how good the rest of the package is, I'm not docking it a star for that.

Overall, it's a great package, very nicely built and finished and does the job extremely well. For £19, I think it's good value and well priced. Very happy to recommend.