Having bought a Superb 280 2017 plate from Cazoo, maybe I can weigh in with my experience to help.
Purchasing the car and collecting was an absolute breeze, but I was always wary of buying a car without having seen in person before hitting buy. They have a 7 day money back guarantee, so if it isn't as you expected, you can hand it back if needed and they also have a 3 month warranty, something which I exploited heavily.
An absolute must if you are thinking of buying the car is to book it in for a health check at your local Skoda/Marshal garage, same day you pick up the car if you can. I believe this is a free/cheap service and well worth it, especially if you're thinking of taking out a warranty with Skoda called the all in (2 year service, MOT and warranty). The reason I got this done was because I wanted hard evidence if something was actually wrong with the car. Also check that they actually have the service history. I was lead to believe that it had the history present, but it actually turned out to be a couple of stamps in the book and a certificate that they had done an oil change, so I was understandably a bit upset by that as I like to have proper documentation stating what's been done. If they claim they have also done an oil change, make you check the level before driving off, mine was 1Ltr down on the dipstick and they filled it up before I drove off. They must not have checked it after filling it up and maybe didn't account for some staying in the filter.
Anyway, after Skoda did the checks, turns out I needed the following doing:
Front pads/discs
New rear left taillight (water ingress)
New Battery
Broken rear passenger vent
Missing spare key
Much arguing with Cazoo later, they honoured it and replaced/sorted all the highlighted faults within the first month of ownership. But you really do have to keep badgering them to get it sorted. Channel you inner Karen and ask for the manager if you're not getting anywhere, 1st line support are unable to authorise any works and just send you in circles.
Since then, car has been faultless! (knock on wood)
Anyway, I hope that helps.