The Dunlop 65 line of products are generally great, so no surprises on this cleaner either. Used it to clean two of my electrics and they turned out squeaky clean, with a fine shine that mirrors, especially the flaming maple top. I'm not sure if this can also be used on acoustics, but you could check it up on the official site. Looks like it will last a long time as you need very little to get the job done. One clarification - this is not meant to be used on a fretboard, just the body, neck and sides. Use lemon oil for fretboard cleaning.