I take 3mg, I went up to 6 but you seem to become immune to it's affects, I now take 3mg sporadicly 3 times a week to keep it's affects . As far as affects go, the stuff is amazingly effective...it turns a 5 hr sleep into an 8hr sleep...the probs for me were I find it impossible to lie in as I wake up to refreshed to early, plus the vivid dreams are freaky, you dream alot more and they are very involved...I've now hooked about 5 of my friends and there results are very similiar.
Is it worth it, yup 100% and they cost about 10$ for a 100x3mg