Gets a big meh from me, but I only use stims for a particular reason, and this stuff sounds like it works well for what most people like to do on stims - go out and party. I enjoy downers of all kinds, which at the moment means etizolam, pyrazolam and codeine (cwe) because that's all I can get. But I'm particularly sensitive to the hypnotic effects of these drugs, and I find that a large enough dose to make me feel good equals a large enough dose to send me to sleep throughout the the effects of the drugs, which is a massive waste of drugs and therefore money. Caffeine, in any amount, does nothing to counter this, so I use modest bumps of ethylphenidate to keep me awake.
I bought some nitracaine because it's got a awesome sounding name and comes in cool-looking crystals (I am a shallow, shallow man). The pain on insufflation was worse than eph but not by much - I always snort water before insuflating anything (one of the best pieces of advice I've ever gained from lurking around these forums) so that always helps an awful lot, and obviously I crushed up the crystals into a fine powder. The drip was godawful though, ten times worse than eph, and went on for ages. It wasn't just the horrible taste, it actually hurt my throat. It did the job in terms of keeping me awake to enjoy my codeine high (512mg is my dose - minus what I lose through extraction, although I like to think I've got it down to a fine art so I reckon my yield is high) but the drip put a real downer (as it were) on things. I sipped some beer but it hardly helped at all.
So my next bump was of eph and in direct comparison it was so much more pleasant - a brief sting and an ignorable drip, easily washed away with beer (I only drink very small amounts of beer while on codeine for obvious reasons). I also experienced a little more euphoria from the the eph - not much, but that's not what I use it for as I said. But the fact remains that eph in my experience does have more mood lift to offer than nitracaine.
I can see why people who are doing a serious stim session would go for nitra, as it's reported to be less scatty over long sessions than eph. I'll keep the nitracaine on hand for oral dosing on the rare occasions that I find myself in an all-nighter social setting. But I'm not ever sniffing it again, and I'm sticking to ethylphenidate for my ersatz (and rather tame) speedball experiences. A nice big hit of codeine, a bump of eph every so often and a beer to slowly sip on in front of the TV (current favourites, Rectify, Top of the Lake, Maron, The Ben Show). Bliss. I'm sure nitracaine (it is such a great name) has it's uses but it ain't going to replace ethylphenidate in my couch potato cocktail.