My wife has a diesel polo 2015 (maybe a comparable model is available in North America?). It's a 1.4ltr 3 cylinder. 90 hp
A small car, now done 130 K miles. All that has failed in that time is the alternator regulator (apart from oil filter housing which was human damage). I have regularly changed oil, filters brakes etc.
Since new it has given 57.37 MPG - US (calculated from tacho and petrol station receipts), VW claim it should be between 52 - 67 mpg.
The newer VWs have more electronics in and many more sensors. Like everything, this has advantages and disadvantages:
- more to go wrong
- small
- very low so really only drivable on 'nice' roads
- The parts are quite expensive and often are cheaper from VW (especially nuts and bolts). I just replaced the timing belt - the cost of a continental kit here for my MKIV with water pump was about 140 €, the polo almost twice that
- if you pay someone to fix anything on it, it's expensive.
- suspension is quite hard - hard for passengers
- complicated, e.g. emission control / EGR system is mega complicated
+ you gets loads of info from VCDS and there are loads of basic tests etc. My MKIV - 3 basic tests, the polo 41.
+ tax is very cheap for it here (MKIV 296€/year, polo 140 €)
+ road performance is very good, and it's certainly fast enough
+ timing belt only needs replacing every 130 K miles
+ self cleaning CAT etc.
+ if you used to working on VW diesels, then the basic stuff is very similar e.g. timing belt change
+ suspension is quite hard - good if you are driving
+ seats 5, fold down back seat
+ for commuting, exceptional
So if you're a do-it-yourselfer and you're prepared to be on a learning curve forever, I think VWs are still a good idea but, at least here, they are more expensive than other manufacturers.
BTW VW is 30% state owned by the federal state of Lower Saxony (not a lot of people seem to know this)