These cars are very safe, luxury cruisers! Not the fastest vehicles, but once you upgrade the wheel and tire package to 18" rims it handles much better, MPG does suck in these days standards and compared to BMW offerings like the 5 series (lighter then the XJ), the XJ interior is suprisingly small, go figure British built!  If you are a taller person like I am at 6'7" tall look to German offerings like the BMW 7-series, Mercedes Big Body S class, Or maybe even the High repair cost Audi A8 with its nice Quattro system AWD.

One huge positive though of owning an XJ is the looks you get of status, and also the women of the world love jaguars as they seem to fit women very good, so want to please your girlfriend of wife, get her an XJ sedan instead of that ugly ass minivan to haul around the kids, or if she is a business savvy woman.  They call this the English Gentleman's car, but it suits a woman much more then a man for the fit!