Yes, it's worth it if you are a film buff and have the space and separate walls from neighbors to make it worth your while.
It's not really that hard. At a basic level, it just involves setup and tuning to get the sound right. The hardest part is probably the subwoofer setup if your room isn't an ideal in shape and treatment.
Soundbar is always a compromise—even the premium soundbar setups. I'd recommend a 2.1 stereo + subwoofer vs. going with any soundbar solution. At least, you'd know your music is going to sound decent while your movies will still get a decent size soundstage.