I'm not particularly tecnically minded but managed to replace my single DIN head unit fairly easily.
The trick is to understand the rear plugs and cable colours of your current unit and the new unit.
The unit you want to use is a single DIN item but has a front 'hangover' for the screen which makes it appear as large as (or larger than) a double DIN.
The screen will hang over into the gearstick area, potentially causing problems.
Also, the location for viewing a satnav screen would seem to me to be sub-optimal.
If you actually have a 4C spider (you have posted in the 4C section, I notice) then it's a different story - I can recommend a good alternative unit.