It is the same width as a TJ axle.
Yes, there is no full carrier locker available for it and they're not a lot of options for lunch box lockers either, but that is the biggest thing.
And yes, it does eat carrier bearings, but that is why you truss and skid it, to prevent deflection.
But there are several people on the Grand forums running this axle with 35"s and having no real problems.
Is this a good swap for a TJ or XJ? Not really, get a regular D44 or 8.8 but the Grand guys where this axle will bolt in, its a pretty good choice.