i used to go on the site often before it signed up for it, i'd use it to find out more specific info on drugs or use it to see other's thoughts on certain drug/drug topics/drug ideas and there was a lot of great info.
now i'm on BL usually in the mornings when i don't have anything to do and i do try to provide harm reducing info on stuff i know about(although i'm not the most responsible drug user

).
there is a lot of nice people on BL who share my drug interests and have a good sense of humor, theres also a lot of people who know the "science" of drugs and they have a lot to teach.
however theres also annoying people who are too quick to tell you that you're wrong when i actually had to correct them on their completely wrong info. theres also people who don't have a sense of humor about things or can't see that i simply posted an opinion. some people just need to chill out.
theres also people who post some of the stupidest things like smoking benzos, downing a bottle of benedryl, shooting ritalin, or other dumbass ideas.
but mostly i'd say the positives of being on BL are i've learned a few things, asked a few good questions/had some interesting ideas, met other friendly drug users, shared opinions(peacefully), got some help/support on some real problems(my girlfriend's past overly self destructive behavior), and have had a little fun telling about some of my crazy drug experiences.
i have learned from this site on both recreational and medicinal drug use and enjoy communicating with other drug enthusiasts.