They come with stiffer bushings, a small tube of grease and mounts for the rear. In the front you reuse the old mounts and just insert the new bushing. That's it. Install was easy and you don't anything else.
Except depending on how old your car is, your front end links might be rusted and you might break them taking them off. I would recommend getting some adjustable like the Whiteline while you are at it:
http://www.ft86speedfactory.com/whit...links-616.html
The ST swaybars are the go-to swaybars in Germany. Pretty much everyone doing a swaybar upgrade choose these. Because they are reasonably priced (as you can see from the links I posted 300€$ vs 500€ for yellow KW), they have TÜV approval (for road legality Germany), they have a sensible size and they are adjustable.
My opinion is that the finish/quality looks good and they do what they are supposed to. I installed them together with coilovers, so I can't compare before/after stock. I have them in the soft setting, my car corners and transitions flat, flat, flat.