I'm glad to hear that you like them. I've been using them for awhile, but recently watched a video done by Tula Pink. She was demonstrating her method for EPP and mentioned them. She said that as she does a lot of hand sewing she has tried a lot of different needles. She bent beyond use or broke many within a day, but found the Hiroshimas to last weeks.
Although I've started EPP, I don't sew that long, so have not bent or broken any, yet. This is why my Tula Nova quilt will take years, lol.