I'm a VW fan. Big time. Not just because they're German and well built, but because they're profitable vehicles. The VW Audi Group (VAG) own Seat, Skoda, Volkswagen, Audi and also own a percentage of if not all of Porsche, Bentley and Bugatti.
You tend to find that if a bloke (or lass) likes VAG, they like them for life. Be it a VW Camper (new or old) or VW Beetle, if they win the lottery they'll perhaps have a Bentley etc, if they then become bankrupt they'll perhaps own a Golf, Fox, Polo, or exuivelent models under their other brands. If they have kids the'll perhaps get an Audi Q7, VW Tourag, etc etc. If they have a midlife crisis they'll get a Porsche, Bentley etc etc
Point being I've found no other brand that has the saem effect on vehicle choice in the UK (I even have Automotive VAG-related websites and forums just because of this fact).
If you buy that Fox 1.2L you'll be investing, as when you come to sell it, you'll get more for it than most other small cars that are similar to it, only due to it being a VAG vehicle which nearly always wipe the floor with second-hand prices when it comes to buy or selling one. Expect to pay a bit more to buy one, but expect to sell it for more than the average comparable car when you sell it.
Insurance seems to be based on vehicle type, usage, area, liability, availability of parts should it need to be repaired via the insurance etc etc etc and VAG look after their brand so ensure that they have vehicles for all types of insurance groups and ensure they keep the group class as low as they can.
The VW Fox is their smallest, cheapest to insure vehicle other than their very recent '"UP!" car which is akin to the Toyota Aygo etc. I bet you 1 trillion dollars (will have to call mini me in on this if I lose this bet mind) that the UP! will be worth more in 12 months than an Aygo that as just driven off the forecourt of Toyota.
Get the fox and don't worry about milage reviews. They're all small cars and they all do well compared to your average hatchback even. Which before the last couple of years were the baseline for economical milage prices.
Just my 2P. You do what you think is best.