I’ll post this in English since my Polish is non-existent
I usually dont post on the forums, but I have a couple of years experience under my belt regarding research chemicals and specifically NEP. Since the lab that used to produce the “crystal NEP” stopped producing it, I had been looking for a good source of NEP. Since then I tried a lot of NEP batches and the quality ranged from very bad to mediocre at best. Lost a significant amount of money that way...
Fast forward to December 2020, I stumble upon DrEnigmas website and am impressed by their broad range of kinds of NEP. After a lot of pondering and reading other peoples experiences, I decided I would take the gamble and ordered 1kg of what is advertised on their website as “NEP Classic”. Communication with vendor was short and to the point. Vendor will not respond to sample requests and replies only if you take your own security measures by using Protonmail and Privnote. The order (“pigeon”) was sent after a couple of days of making the payment, and I got tracking info as well. After a week the pigeon landed. As told by others, packaging is masterful. Expect to put in some work getting the ordered goods.
As for the NEP itself: its as good as the big crystal NEP that set the standard for being very potent NEP. Very good product, and that for the very competitive price of €900 per kilogram. I know I don’t have any reputation on this forum but take my word for it, DrEnigma delivers. Definitely recommended