Never having sailed with Mast Pulpits, what are the reasons I should or should not consider them?
There are two primary reasons why we're putting them on Jo Beth:
1. Safety. They give us a strong point to lean against when working at the mast. Our control lines aren't led aft, so whenever we're raising/lowering the main or staysail, reefing, making outhaul adjustments, etc., one of us is at the mast. The pulpits will supplement clipping in.
2. We're short. Those who are not vertically challenged don't have to deal with this, but with both of us standing under 5'5", it's tough for us to scramble on and off the coachroof at times. The pulpits give us a solid handhold for stepping up onto and down off of the cabin top.
Another benefit is they give us a place to stow halyards and other lines and create alternative lashing points for...whatever may need a good lashing.
They also serve as line guards to protect the dorade cowls from flailing sheets. We're adding dorade boxes and heavy cast bronze vents as part of the refit. More than once, we had to chase down the plastic Vetus cowls when flailing genoa or yankee sheets sent them into the air.
I'm sure others can add their own reasons for having them, but for us, that's the gist of it.