If edible or smoked cannabis tastes chemical, PGR is present. You may get a brief chemical high that leaves you exhausted. Pgr vs non pgr lacks fragrance flavonoids and terpenes and has a "buffed," complex, and frequently colorful appearance. The less dramatic variant is preferable to the more attractive one because the latter is more likely to burn a hole in your wallet and make you ill if your bud looks dead and horrible but smells and feels fantastic.