In a word, they’re fantastic. So glad I did this.
I used the same Auto Zone Ford Fan Clutch Wrench that
@DanInDenver mentioned,
above. Three of the globes slipped right off, needed a hammer and chisel against the fat part of the old globe for the last one. Took a bit of effort. Threading the new globes was a pain, they're heavy, you're tired at that point, and you're wriggling your hands up into a confined spot. But that was it - it's a very easy job.
My all-in cost was $726.18, including the shipping. If there were any import taxes included in that, I didn’t notice them specified.
Took two weeks from order to my door. They provided a FedEx tracking number, so I followed it across the Pacific and North America. There were a few days between my order and their follow-up with the calculated shipping charge, and a few days after I paid that before the tracking number.