I went halves with Ben on a gram of the 20x, and my god was it amazing. I knew what to expect, so I figured I wouldnt have a bad trip.
The first time, I used a normal lighter and took a massive rip out of Bens bong. It was either strawberry or regular flavor, I forget, but it tasted delicious nontheless. I cant remember anything after I exhaled apart from laughing like a maniac for what Ben said was a few minutes. I played with lipstick apparently.
The second time I tried it, I dumped the rest (about .3g) into a pipe and smoked the whole lot in one go, in my bedroom with the lights off. This again was with a normal lighter. I held it in for as long as I could (dont remember exhaling), and all of a sudden this purple/blue mist comes out of the darkness and starts pushing me down onto the bed. It kept pushing me and pushing me, I was literally being forced downwards.

Something I would definately take again, but with a torch lighter and using a bong aswell. The stuff is quite harsh, but easily manageable if you smoke rollups. For someone trying it a first time, Id recommend you using a normal lighter at first because its pretty powerful stuff.