Recommended · for some experience
SMD Removal using a Chip Quik kit
Why people recommend it
Shown to people needing to lift many-legged surface mount parts, as a demonstration of how a low temperature alloy makes removal much easier.
Watch for: The alloy is pricey, though a small amount lasts
In their words
Here is a YouTube movie on how a pro uses chipquick
Piotr Kula on raspberrypi.stackexchange.com, Feb 2013. CC BY-SA.