I first took LSD back in 2014 I believe, after researching everything surrounding the topic for a year. My wife was completely on board and we allocated a three day weekend.
All of the research indicated that it was completely safe from a physical perspective and for a stable and fairly well adjusted person like me, with a very informed and willing helper, fairly psychologically safe.
Me being me, I decided to go big on the first dose. I took well over 600μg.
I won't say this was a mistake for me, but it was a rather rigorous experience that lasted most of three days.
All of the trip was interesting. Most of it was a range between neutral and amazing, but there were definitely some bad trip elements.
About once a year since then I've taken a much smaller dose. At the moment I don't have a desire to repeat the huge experience, but I won't rule it out for the future.
Very briefly: during the worst of the bad trip parts I lost the ability to understand and produce language, which was scary for both my wife and I, though we understood that the impact would be temporary. This happened about 8-12 hours after the trip started.
None of my subsequent trips (all between 50μg and 200μg) had any big bad effects.
And yes, the whole experience was a big win. While I as doing pretty well beforehand, there were some areas of tunnel vision that greatly improved.