I used that and got my money back when a shipping didn't arrive.
Also the quality and honesty of the sellers on the quantity they're selling you is great.
It's beautiful to see how the market and a reputation system can work wonders, even among strangers with anonymised identities.
The street experience equivalent is terrible. A friend of mine (who self medicated in one of the western totalitarian regimes who prohibit weed) got a bag of tea, tissues smelling like weed, he got a knife pulled on him, he got scammed in an elaborate plot which involved him keeping a bag of flour (supposedly coke) while the dealer supposedly went to get his weed for a 50, he had homeless dragging him to a gang of criminals under the pretence of buying weed. Eventually he found someone reliable, a middle aged father with a stable but low paying job and a family - but it's a miracle he's still alive.