I have some second-hand experience with them. A little over a year ago my daughter's brother-in-law, Troy, was looking to buy his first bike and his wife Brianna (my daughter's sister-in-law) asked me for help. They had a good budget and I was able to find several good examples of different style bikes on Craigslist and Facebook Marketplace. I had some newer small cruiser style and standard style bikes and a few smaller (350-450) vintage biles. One of the vintage bikes was a customized CB/CL350 and I told them that was the type of bike I pictured Troy on.
I remembered that Throttle Company had some vintage bikes for sale and suggested that Troy contact them, thinking that if they didn't have anything, they had more time than I did to look for something. As it turns out, Brianna and Dylan from Throttle Company were friends at a previous job. Throttle Company found Troy a mildly customized 1976 KZ400, and last I heard, he was happy with the experience. I was hoping to hear some details of the transaction but have not, but my daughter sent me a pic of the bike shortly after the purchase.
Wade Dunham