Pulled my hakko out of the box, turned it on, default was 750, haven't touched it in two years, never had an issue with a board, coil, switch or anything else I've come across. As noted, technique is important so don't hold the iron on the board for too long, as is the selection of tip, chisel works fine for non board work, pin point tip for board work.

For me, in tight spots, I can't maneuver a chisel tip as easy as I can a conical. My hands are too shaky sometimes and the conical gives me a little more room to work.