I bought a set of these while i was in Canada last week. I just got home from the airport and installed them as soon as the engine had cooled.
I noticed that the idle seems smoother and the throttle response has improved. The idle still has a little stumble but this may be from some air getting into the system, but defintately a worthwhile upgrade, especially if you´re still running the stock 20 year old wires.
On the downside...the wires don´t fit the into the harness. I´m going to have to look at a creative solution to this.