Do voltage stabilisers actually do anything worthwhile?

[shadou]

another thing with those super earth/voltage stabilizer kits is it makes it ****ing annoying to work in the engine bay with an extra 4-6 wires running all over the dam place!!! **** those things pissed me off everytime I saw one.

[IZY-10]

only useful on older generation cars. Basically just creates better grounds. The reason why they suit older cars is because the wires are most likely decaying therefore loosing there full potential. Installing the kit will rectify the issue and take it back to original factory standard again

[Encor3]

I have the grounding kit from hks. (big round thing) for me its worked good. But i started off with grounding issues, Car starts alot easier (almost instantly) and audio is a little bit clearer. Throttle is definately more responsive.

I dont see the benefits of this on a newer car though. As the grounding would already be really good.
EDIT: I dont have a voltage stabiliser. I have a grounding kit.