I've also recently tried this after reading about it here and doing some research. First, it definitely had a positive effect on my anxiety, and this is not just a placebo effect (I should add, nothing I have ever taken has done anything for my anxiety before). I noticed a whole new level of a more carefree me, but not in a drunk way. I have not tried benzos but some have compared it to them.
Like Seph said, it is not a dramatic difference that you feel, but more something that you notice in your actions. The great thing was there was no drowsiness from it, and no mental impairment. Also I felt I slept much better (common for people to take this for insomnia). Also dreams were a little more vivid.
Now, I did have some negative side effects. I'm not exactly sure how much I took, and I would suggest being much more careful than I was in measuring (it's most commonly sold in a powder form). When I took it in the morning (somewhere between 1.5 and 2 grams) it was fine. But in the evening I took another similar dose and later that night and most of the day yesterday I experienced the 'hangover effect' that I had read about (I wasn't drinking). This stuff stays in your system for around 24 hours (which can be good thing). I think a combination or taking 2 doses within 24 hours and not measuring carefully possibly led to this. It's not fun, and I felt slightly nauseated and my head felt a bit 'heavy', and I found it unpleasant enough that I spent most of the day in bed. This feeling lasted at least 24 hours.
So, I would definitely try this on a weekend, or when you don't have to go to work the next day. Start with a single low doses. I am worried about tolerance, so I am not planning on taking this everyday, and I am cutting back the amount.
I'll update next time I try it.