The soft tops on the unlimited are inherently more difficult to raise and lower than the two doors. I have had experience with the older design factory soft top and the new premium soft top both on my 2013 which was purchased new with he hard top only. If you are looking used, it is well worth the extra money to find the newer style spring assisted factory top (premium or standard).
As far as aftermarket tops, I helped another Jeeper install the Bestop Trektop NX on his. The initial install was much more difficult than a factory top, though it didn't help that we were in a semi-heated garage during below freezing temps. I'm sure it would have been easier in the sun with temps over 70 degrees. It seems it would be more difficult to manipulate than the factory top though and there is a loss of cargo space with the fastback style if that is of concern to you.
You can often find a factory take-off soft top in new or near new condition for substantially less than purchasing new if you watch the forum or other classifieds.
A lot depends on how much you want to spend. I'm using a premium factory soft top that was a take-off from a 2014. I can't imagine a top that is better quality or easier to use.
Installation out of the box is pretty straight forward and not something you would have to go to the dealership or pay someone else to do. The only tools you need are a couple of torx drivers. If you are wary of doing it yourself, I'm sure you can find another local Jeeper that would give you a hand. It's basically a matter of bolting to two brackets to the roll bar in the back, bolting on the door surrounds, and snapping on the rear window bar retainers. Everything else is what you do when raising the top. Fold the top forward, secure the header latches, attach the sail panels to the rail, zip in the side windows, and zip in the rear window.
Good luck with your purchase and install.