My only ehpro is my kayfun lite v2, and it is great. The v2 is leaps and bounds ahead of the old design, though ironically I get more airflow out of my original lite clone. The ehpro came in a great box with a full clear tube in addition to the usual stuff, and some kanthal, silica, and a keychain screwdriver. For 31 bucks shipped, from a u.s. Vendor.
I have no experience with ehpro mech clones. I have tobeco, hcigar, and acerig. They all have their merits, and though ehpro seems to be good, I don't think any manufacturer makes good clones across the board. I think you have to research each model to find the best, ideally.
Also, individual batches etc... Vary by brand. China clones don't have tolerances and inspections to the level of a good authentic, if at all. So one acerig akuma might be great, as most videos I've seen have said, but mine has a slightly wonky locking ring. That makes it worse, since it's even hard to just say X brand is the best.