Purchased 3 grams. Baggie weighed 3.7 grams including the bag, so it was definitely over weight. I didn't want to dump the whole thing out to weigh exactly.
Communication was N/A. The vendor sent copypasta one day after the order, notifying that the package was shipped and asking politely for FE, but FE was not required.
Shipping time was about 2 weeks to U.S.A. No complaints about stealth. Someone who opened the envelope would not immediately see drugs. Anyone who took the contents out of the envelope would find the drugs immediately 100% of the time. So, good enough stealth, but not the best ever.
Product is a clean white, dry, crumbly powder. Drying did not reduce weight at all. I performed an acetone wash, which washed out 9% of the product, but for reasons which I won't go into, I am certain that is due to my technique and materials, not because there is any cut. I would treat this stuff as basically pure. If it is cut, it is cut with something that dissolves in water and does not dissolve in acetone, just like amphetamine.
Marquis reagent reacted exactly correct for meth/amphetamine.
Bottom line: this stuff is probably amphetamine, and it is probably not cut with anything.
EDIT: I have used the stuff since I wrote the review. Everything still checks out. I have taken Adderall both oral and insufflated. This stuff doses a little weaker than Adderall, which makes sense, since Addy is 75% d-amph, and this stuff is most likely 50% d-amph. Based on that ratio, results for this stuff were similar to an Adderall dose approximately 2/3 as strong. In other words, 30 mg of Adderall = 45 mg of this stuff.
Subjective usage compared to Adderall tends to confirm that this stuff isn't cut. Obviously, this is just one dog's opinion, though.
Thanks, great review!