I have a TJ and put an Aussie in the front, same basic thing. Its not that hard to install, pretty easy actually. IMO a lunchbox upfront is one of the best upgrades for the money. Around town in 2wd not even noticeable 4wd on pavement or grippy surfaces is an absolute no, on slick roads 4wd is fine, but tends to plow on sharp turns. If a selectable front locker just isn't and option, saving over one thousand dollars and going lunchbox is not bad at all.
Works like a spool offroad, the most dependable locker I have ever used or seen (tied with Detriot). Biggest down side is tight maneuvers on the trail take more time, the jeep just likes to plow especially if its slick out. But is fine on dirt and rocks and other higher grip surfaces.
Bit of a tip, putting synthetic in your diff makes the locker slip easier, nicer around town still highly effective offroad. I do it in the vague hope I might not snap a U joint.