Disclaimer: I have MDMA from polira and coastalconnect. I will write reviews on both vendors once I actually use their products (in addition to Cali_Connect's LSD). As far as stealth, shipping, and communication I have had positive experiences with all three vendors.
I have an event in the near future that some friends and I will be rolling for. Whose product would you recommend I go with for this special night? Also open to hear about suggestions for any other domestic US vendors!
Polira's mdma is pretty damn good. I took 100mg and rolled hard, lasted maybe 6 hours.