Fender Speed Slick String Cleaner

It was the first time using such a product. It was absolutely excellent in cleaning both old and new strings.
I used it almost daily after playing (usually a couple of hours/day) and it kept the strings very clean and shiny as long as I used it. The shape and size is ideal, one or two swipes to apply on the strings and it is very practical to carry in a gigbag (flat and wide). It provides a nice slickness to the strings, just be careful not to overdo it. Mine lasted about 40 days, I wish it would last longer. To be fair, I think I used too much of it during each application for the first couple of weeks and perhaps it wasn't necessary to apply so often.
In a nutshell, it is perfect except maybe for the duration. I tried in parallel with the d'Andrea string cleaner, which cleans well but gave me a "sticky" feel to the fingers. I even tried to refill the Speed Slick with the d'Andrea cleaner so I could take advantage of the convenient packaging and applicator but that resulted in leaking. Next I will try the classic GHS fast fret and if necessary I will update this review.

This string cleaner provides great protection from my strings, which is great for me as my hands get fairly sweaty when playing which eats through my strings like nobodies business requiring my to restring more often than I can really afford to. My strings feel smooth, fresh and alive after I use this to wipe away any grime from them, however my only real issue with it is occasionally the small cloth that comes with the cleaner can leave little bits of fluff/cotton caught on the strings, particularly in the lower frets where the string is tighter to the fretboard. This isn't a major problem though as the residual bits can be easily removed and don't have any negative effect on the strings.