I've done lots of them, oddly enough not on my truck. Not really any tips other than I like to support the door with floor jack, and block of wood. Do one hinge at a time, and if you bought just pins, you should get bushings as well, I think most come as a kit with both. Sometimes the bushings can be a bit of a pain, but remember they are brass, so push the new ones in as straight as you can and remember if you hit them to hard they will break. I say about a 30 - 45 minute job, as long as there aren't any complications. Occasionally it seems like the hinge doesn't want to line back up after the work, and you just have to play with it. If you have super nice paint you might want to put painters tape along the edge of the fender so if you loose control of the door in that direction when one of the pins is out there is little risk of damaging the paint. I'll be fine and more than likely you'll think it was relatively easy.