I got some white-on-white in Western NY, pretty sure it was from the Furthur concert. It was good, but low strength, definitely felt "clean" but who knows. One hit just gave me that feeling of energy in the back of the head and that tugging on the corners of your mouth that makes you unable to stop smiling and laughing. Not much pupil dilation but I was definitely high. Smoking a bunch of pot with my friend resulted in some soft but gorgeous visuals. Faces looked bizarre and vaguely sinister/disgusting, but when I looked closely I wasn't really hallucinating, just perceiving aspects of people's faces I wouldn't normally. Same with the visuals, things weren't moving around so much as I was perceiving patterns that were already there and focusing on different patterns in turn in such a way that it was like they were moving but they weren't. I noticed this acid had none of the speediness I associate with acid, in fact when the peak was over I felt like I could easily go to sleep. Also the actual peak with visuals and tripped out thinking only lasted like an hour and a half, but I could still feel a little something for 12 hours total, especially if I smoked some pot.
In other words a typical low-dose acid experience, good times.
Incidentally how the heck can you tell if your acid is dirty? The old studies and such report gastrointestinal discomfort, muscle tension, and headaches as fairly common side-effects and their acid was 100%. I do have a suspicion what I had was an ergoloid alkaloid, mostly because the peak effects didn't persist and I had an appetite and did not feel stimulated (or really remotely intoxicated, the trip was very smooth and natural feeling), but given how widely LSD can vary I wouldn't be surprised if it was just 40-60micrograms of bonafide Lysergide.