They're not the easiest thing to do, but it's nice knowing that no one else is going to abuse your rims.
Takes about 20 minutes per tire to remove the old and mount the new.
Also, helps immensely to have an air compressor so you can give the newly mounted tire a blast of air to seal the bead. Sometimes you have to run up to 40 or 50 psi to get that final bit of bead to pop up and seal. Then I remove the valve core again, drain the air, let the tire relax, put the valve core back in, and air it up again to the proper psi. About 30ish for my preference.