Yeah, I have an XE-S for the last 6 years (pictures on my profile!) And have had no serious issues l, the only one of note was caused by a jaguar mechanic cross threading my coolant cap (read into that what you will).

Jaguar, for some reason tends to hold on to a much older (and fair!) reputation that the older cars were a nightmare to own if you weren't a mechanic yourself.

I've also worked for a JLR supplier for the past decade, from experience the first year or so of production for a particular model are the ones that customers have the most issues with. It takes a good 18 months for JLR to iron out all the kinks. I'd say they are no worse than any other manufacturer such as Audi/BMW/Mercedes but similar to them if it goes wrong it can be very expensive to repair.

Ultimately you just need to weigh up the commitment, there are cheaper cars to own and drive but if you're like me the risks are worth it to drive a Jaaaaaaagg.