I'm on the fence with these. I can see the point and understand the design decision - with the appropriate belt material and oil spec they will last just as long as any other belt. But, BIG BUT, manufacturers use multiple suppliers, all trying to make a margin, and oil used at service time (including dealers) trying to cut costs.
Means it's just not a sustainable design without much better quality control.
Case in point is Volvo gearboxes. The oil for the auto transmission contains unobtanium or something akin to ground up virgin dust that costs more than the GDP of a small country, replace it with something cheaper (but on the face of it the same oil spec) and you'll be looking at a new auto box in 10,000 miles if not sooner.
The people that design these things aren't at fault, it's the supply chain (both pre manufacture and post support) that are at fault.
Personally I would have one of I needed a small car, but I would have the belt changed with a genuine ford item and only use genuine ford oil. Even then I would probably change it sooner than recommended and also clean the sump and strainer at every services. But as I do ally own servicing it costs me nothing but my own time to ensure it's done right