This has been openly available (hopefully that's not too close to sourcing, apologies in advance if it is) for a very long time through multiple vendors, both clear and dark net, and noone has had much to say about. I doubt that this is the result of people not sharing worthwhile experiences with it. There are FAR more promising cocaine derivatives out there that there are a couple of reports on (ie RTI-111) which lacks local anaesthetic effects but seems to be closer in pharmacological terms. I'd look elsewhere.