This sits below the notebook and clicks into it. It does not work on all HP notebooks - so be careful there. It is neat in the once it is on the desk, nothing can take that space so the notebook will (almost) always have a place to go if the desk gets a bit untidy! This version has 2 x Display Ports, although these days I think HDMI might be better. Transfer cables are easy to purchase.
As for the price - I cannot answer for digitec, except they give me a good service! I have spent > CHF50k with them last year without any problems, and when there was one, they replaced the machine with no questions asked or forms to fill in.