[kevinchen]

Apple's laptops are RoHS, so the melting point of that lead-free solder should be even higher than 183 C.

[ja27]

And all the joints look like cold solder joints instead of nice, shiny but toxic, lead-filled goodness.

[jrockway]

I use lead-free solder for hobby work. A good joint is still shiny as you'd expect.

I basically notice no difference, except the need for a higher working temperature.