I'm using Chipquik flux and solder and I'm very happy with it. Truth be told though I've not tried anything other than this. Someone told me when I started with electronics to buy good quality solder so I've always spent money on something above the 'bottom line' in terms of price.
EDIT: Come to think of it I'm pretty sure I heard it in one of the early EEVBlog videos ^^
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'm using Chipquik flux and solder and I'm very happy with it. Truth be told though I've not tried anything other than this. Someone told me when I started with electronics to buy good quality solder so I've always spent money on something above the 'bottom line' in terms of price.
EDIT: Come to think of it I'm pretty sure I heard it in one of the early EEVBlog videos ^^