Thanks for posting about this. I'd not been aware the H4 had come to market. I just bought one from R&L whom I'd never heard of before. I already have the cheap 2.8" black clone, but the H4 is too nice not to have one. Though it could be said I have a ridiculous number of VNAs now, VNWA, xaVNA, 8753B and 8510C in addition to soon two nanoVNAs.
Have Fun!
Reg