Quality wise, most likely not. Ride wise, unless you have KYB AGX or Koni Yellows, the ride will be VERY bouncy and stiff. Also, if you plan on going lower than 1.5", you'll need to get custom struts made to handle the drop.
i do not recommend getting those on any car...i worked for a company that sells those "ebay" coilovers and they basically use the same springs and spring rates for all their coilover applications. it is cheaper and easier that way.
nah dude. stick with a good set of springs instead. check out the deals on the $110 tein s-techs. the only advantage of having those cheap coilover sleeves would be the ability to adjust height... which youd still be limited at 1.5 anyways because of your struts