This dock is well built, and comes with two adapters, aside from the one fitted to the dock itself, when you receive it. The sticky pad on the underside of the dock is adequate for stopping the dock from effortlessly sliding around on a smooth surface, but will probably degrade over time once the surface gets tired/dirty. Even without this, if you accidentally knock either phone or charger, the sticky pad itsn't going to stand up to that kind of abuse, and the whole thing may topple over without too much effort.
Considering this thing is essentially a block of plastic, with a pass-through connector, nigh on £40 (£37.99 at the time of writing) for something like this, is quite honestly daylight-robbery. This thing should be half the cost of what it is.
Another issue with this charger, is that people (including me) will buy it, thinking they can charge their phone inside it, by virtue of the fact that since it comes with variable width adapters, they will be able to leave their case on the phone while charging. You may get lucky, but the width/depth of the supplied adapters is largely irrelevant. What is relevant is the thickness of the material on your phone's case, and the size of the cut-out for the charging connector, in the phone case.
Unless the case is super-thin (and I mean SUPER-THIN) and/or the cut-out is larger than the size of the plastic block, surrounding the USB-C connector in the dock, the two connectors simply won't mate together securely enough to form a connection, so then you will have to remove the case anyhow.
So unless your in desperate need for this kind of device - because you use your phone in place of a traditional alarm-clock, or you say, run companion apps that interface with a game your playing on your PC, and therefore need to see the screen all the time, just go out, buy a decent-length USB-A to USB-C cable and save yourself the best part of £40.