Burl Maple, 2 years old(approx)...it came with a cpl Holes/Flaws in the body where the plug fits...its been left on up to a month at a time, put back for a month or so and brought back out to be plugged in for another month...all to NO CHANGE in these Character Marks(Individuality). Was Worried at 1st, but, apparently No Need.
I Agree about the metal screens being Trash...Clog easy, get bentup easy, PIA to remove, then clean, then reinstall. After using the Glass screen stem, Ive Never gone back to the metal screen stem. Also ordered one of the Glass Screen "Ice Stems"...that being a Game Changer for me due to its Cooling/Smoothing effects(I also use the "Ice Stem" with Apollos WPA on the AirVape X, Excellent Hack IMO) !
The Nano is a Simple, yet, Top Shelf, Pure Convection apparatus. From Micro dosing to Explode your head Mega Rips. And the Taste/Flavor it delivers is matched Only by the MV1, IMO..."TERPENE GUN" some may refer to it as. SIMPLE to use, yet, Versatile in its many uses.
As far as Value vs. $ spent, its AT THE TOP, IMO !!