I remember getting a full set of Stern Tanning heads for my bop kit. I was incredibly stoked about the sound. Then I took them to their first gig-- a restaurant-type jazz gig on a brutally cold night in Upstate NY. And I was set up near the radiator, which was about 15' from the door. Those heads became completely unmanageable-- any time someone held the door open for a few seconds, the heads would respond. by changing tuning.
Now, admittedly, this was an odd situation and probably if I'd just stuck with it for a few months of gigs I'd have figured out the tricks. But the gig ended up being enough of a nightmare that I took them off and never went back.
It's a great sound, for sure, but at this point I'd only use them for a dedicated home studio kit, which I don't have.