after having VMX80 in my GB for a little over a month now, the gears were starting to feel real notchy.. It was great at the start (and made morning whine go away), but after a month felt like sand in my GB.
The other day I put in Redline Shockproof lightweight in, and what a difference!! WOW. although its quite pricey, the GB feels sooo smooth between changes now, cant believe it.
Defn recommended.