I just picked one up yesterday from a local Waitrose as I ordered from John Lewis, the cable is fixed to the unit and USBC connection the other end, the cable is around 93cm long, you DO require a 20w or above USBC charger too plug it into, I bought the one shown in the image below on a pre black Friday deal for £27.59 from Amazon that is more than sufficient, I am sure the deal will come up again over black friday proper, with the phone bare it magnetises quite well to the unit, not sure if I would dangle it over a stone floor and shake it but I would say if you had it on the dashboard of your car for example it would hold it. The cable coming from the puck is a bit of a pain but you just rotate the puck so the cable comes away where it doesn't t annoy you when holding it, it DOES charge faster and when you attach it a circle appears on the screen confirming connection, but DOES NOT work through my silicon case, I just sent my Apple case back because it was awful and not worth the money IMHO, I bought the Nodus MagSafe compatible case that is also magnetic, see link for info
https://noduscollection.com/collections/phone-cases/products/shell-case-3
There will be bare support units of all different types appearing soon I guess like the apple watch where you put your own puck in, is it worth it, in a one word NO as you still have to buy the charger that Apple said they weren't including to save the environment, wait a minute another van just had to deliver that in further packaging!!!!, BUT I had no choice, its more a max £25 unit to me but at least I have one original one, I won't be rushing out to buy another!
USB C Charger, RAVPower 65W PD Charger 4-Port Desktop Fast USB Charging Station 2 USB C Ports + 2 USB A Ports for Air, Dell XPS 13, iPad Pro, iPhone 12 Mini Pro Max, Nintendo Switch, Galaxy and More
www.amazon.co.uk
Hope this helps 👍