Search around, you'll quickly find out the history of 98-02 slushboxes and that they're junk, especially the V6's.
Lucas makes good stuff, I've never used it myself, but they have a good rep. I'd drain and refill the transmission fluid with Honda ATF-Z1 first, then use the Lucas on the fresh fluid. Think of it as a band-aid, it's not going to really fix the transmission or extend it's life much.