I did a soft top for hard top trade... One of the best mods i've done. No more worries about zippers and all. I think it'll pay off come winter time. Oh, and no wind noise!
If your Jeep did not come with a hard top originally then it will be missing the wiring harness for the hard top. This means no rear wiper or defroster. Its a pain in the butt to put in that harness if you have no experience with wiring