I've tried using lead free to see how bad it really is. I got a small roll in my soldering kit and had it stored away and was contemplating to throw it away.
Just recently I decided to try it to see how it really works and to my surprise, it worked quite well. Usually have my station set to 310C and I know that's the correct temperature because I always check it with a tip temperstute tester, and it melted and flowed just fine. My joint wasn't too dull as I thought. So yeah, if the quality of the solder is good, it doesn't matter whether leaded or lead free, it'll still be good. Kester has some top quality lead free solder, so buy and try and see what works for you. I'm switching to lead free, but to beginners, practice with leaded solder