What do u think of the trd sway bar?

i am considering geting a sway bar have the trd lowering springs not on my car yet but i will be instaling them realy soon will i notice a diff w the springs and sway bar also how hard are they to instal cuz if it has to be proff instaled i am not gona get it am puting in my springs so i am prety decent w a car what kinda other than trd what brands make a sway bar do those brands void the waranty i have a 2009 w 10k