GHS Fast Fret

Great.

I'd forgotten about this stuff, but remembered immediately upon smelling. The can says non-toxic but this is hard to believe. I don't understand how anyone tolerates it.

Worked good. Nothing spectacular, but did help smoothen playing.(Also made my rosewood Les Paul fingerboard look great,actually).

Plays like butter!

Been using this product for more years than I care to remember. Strings last longer, fingers fret and slide painlessly.
Each to their own, but as long as GHS keep making it, I'll be buying it!

GHS fast fret helps preserve the life of your strings, but its not as simple as wiping it on and off.
Typically when your tone suffers because of old guitar strings it is because the oils/dirt from your hands builds up on the string and even causes some corrosion. Cleaning that crud from your strings will open the strings back up because the crud was dampening the vibrations.
This product won't make your strings like new, but they can help extend the life of your strings significantly. Very handy, especially if your acoustic takes a while to settle in after string changes.
When I apply Fast fret, I through scrub the strings with the applicator, then take the chamois cloth and thoroughly clean all around the strings.

Tried this item once. I didn't notice much difference on the strings. Also, when I put the container in my bag, the top kept popping off. I had to put rubber bands on it to keep the top on.