2 - 4 horas
Wanted to increase HD space and use an SSD - a second HD was the way to go for me. So now my boot drive is a 250GB SSD, and my huge iTunes folder is the only thing on my old 500GB HD.
Very straightforward - the online guide was great and the tools and parts were spot on for the job.
SSD's are awesome ! My 2011 Mac Mini boots and is useable in what feels like 10 seconds, and most of that is me typing in my password ! I used Carbon Copy Cloner to move the files I needed to move, which can be done for free within the trial period. I'm going to buy it though :)