The problem with pills like that is that you'll just have to trust whoever you got it from.
Here's how the mechanics of the whole pressed pill scene REALLY WORKS, generally....
'Joe' presses 500,000 pills......he sells these through his normal network, and since he made the dosage proper, the pills develop a good reputation, much like what you're asking about.....then, once the original 500,000 are gone, ( 1-2 months) another batch is pressed, this time, though, the pills are generally half-strength, but,
BASED on that rep, which was good, they will STILL SELL just as well as the 'original' ones, because they look just like them, and will respond to Marquis reagent the same way. ( pill test kit)
THEN, herre come the copycats......usually, within a few months of the original batch, MORE of them come out, same look, different manufacturer, different chemicals, usually totally bunk, AND THEN THESE fucking things sell for a few more months, BECAUSE there are still enough 'good' ones floating around with some half strength ones,
to allow some copycat to make a million dollars, selling caffeine pills.....
My point is this......I wouldn't have much faith in what anyone tells me about a pill, unless I am with them when they do it, then I can come to my own conclusions.
There are a TON of unscrupulous greedy fucks out there dying to take advantage of everyones desire to open themselves up.....
You'd think 'our' realm would be free of thes infestations, but they're not.