If you are of the "car as an appliance" mindset, and just like to drive a car with as little involvement as possible, you're better off getting a Civic or Corolla.
With a TDI you have to understand that you can NOT rely on the dealer AT ALL to do anything right with it, and you are on your own for maintenance, you can't take it to Jiffy Lube. You have to assume the warranty is crap at best, VW is terrible about honoring the warranty, and they probably don't know how to fix it anyway. If it is a used car, you need to assume it was neglected by the prior owner(s), or at least they didn't do the proper maintenance.
On the other hand, if you don't mind getting "involved" with your car, VW TDI can't be beat. THere are certain "things" you have to do but if you already own a diesel they are not too strange. The good news is that they are VERY simple to work on, even the dreaded timing belt. VW gassers suck to work on, but the TDI is amazingly basic in the way it's put together. IF it was neglected by the prior owner and drives like a dog, a few little things will probably get it running better than new, IF IF IF you do the work yourself.
My 2001 has 140,000 miles on it, original front brake pads still, I drive the stink out of it, it's, well, "warmed over"

The only problem it's had that is not "self-imposed" is the glow plug relay going bad, and a MAF, but those are kind of par for the course. Turbo went after 130,000 miles of HARD life, nothing spectacular, it just stopped making boost one day, bearings just wore out.
It got 37-40 mpg when new, bombed to almost double the stock power and torque, still gets 37-40 mpg (it's an auto).
It's not a "casual" car, but IMO it is very rewarding for an enthusiast who drives a lot and wants good fuel economy.