I absolutely adore my jaguar xj, highly recommend this make and model.
I really haven't had any major problems per-say. I actually love my vehicle and keep it in pristine condition. The one issue I did have (car is fully loaded) with that said: the heated/cooled seats are leather. The attachment bar under the front seats does become disengaged periodically. It has been reattached a number of times yet still unattached itself. That would be the only major issue I have had with this car. The car is comfortable, have used it for long road trips and is very reliable. The performance is outstanding, I love the supercharger model and it is a fun car to drive. The car is fully loaded with every bell and whistle available with this model. I highly recommend this vehicle & model. I will definitely purchase this make again.