My personal experience is with talpentadol administered rectally for the back and foot pain that are a result of not acting my age (bones break easily when you're my age). It was meant to be administered orally, but at only 30% bioavailability (due to 1st pass metabolism by the liver), I opted for rectal administration (NOT what the doctor ordered!

).
While primarily an opioid, there is a distinct stimulant character to noradrenaline reuptake inhibition (where you get noradrenergic effects, dopaminergic effects are common & vice versa), which I quite like, as I'm not a fan of the inertia of morphine. There is an element of anxiety, but that is easily dealt with
by small doses of benzodiazepines, when they occasionally occur.
Dosage wise, I find 50mg rectally every 4-6 hours keeps the pain away and keeps me amused. I hope there aren't significant w/d effects: at least no more than my permanent prescription for dihydrocodeine will deal with.
In terms of structure, it overlays opioids like hydroxypethedine, but the amine group being 3 carbon atoms from the benzene ring makes it slightly similar to amphetamine (or cocaine) and that's what I think the noradrenergic effects come from (there's a Ph.D. thesis paper that covers the structure of the dopamine receptor and associated dopaminergic SAR that makes for interesting reading).
Anyway, it gets my vote