On paper they are the best of both worlds. In practice it is the worst of both worlds. Yes range is no issue but you need to go to gasstations and still need to charge your car most places you go if you want to reap the benefits. I honestly prefer non plugin hybrids to plugin hybrids in this regard. But i much rather bite the bullet and drive electric, even if i have to stop and charge on roadtrips. The increase in comfort of electric driving is worth the downside of longer traveltime to me.

And that is from a drivers comfort point of view. Maintenance is the same story. Having all the downsides of a combustion engine in a car that could have been an electric car.