where i got mine from was http://www.iamshaman.com/ , i got the 10x for the first time and all i can say is... oh my god, this stuff is sooooooo crazy and find it hard to believe that this stuff is legal over weed, this is my experience:

packed a bong of 10x and my friend hit it, then i took the rest (stuff burns fast) and held it in for a good 25-30 seconds (you have to or it wont do nothin), anyways, im like... weird nothin yet, so my friend packed a full bowl for myself and as i was about to start ripping the bong the next time i started laughing a little bit, but still managed to be able to rip it good, and rip it good i did, i held it in for another good 25-30 seconds, i cant stress it enough that you hold it for this long, it might be hard but you have to do it, anyways, immediately after i blew the smoke out i was in another world, i literally thought i was driving a mack truck down a highway in the middle of the night, and i could see the white lines on the highway flying by me, you might think i'm joking around here but think what you want, this is the truth, i still have a clear memory of this happening, this went on for probably a good 45 seconds and i didnt even know that i was resting my head down on my arms, when i realized that, it felt like my head was sinking into my arms and like blending together, so what i did was lift my head up and i was laughing uncontrolably, i felt like everyone was looking at me (they probably were but whatever), so anyways, i put my head back down and i started to sweat sooooo bad, it felt like i just ran a mile at full speed without stopping, so i stood up and took my sweatshirt off so fast and threw it on the ground, i really had no idea what i was doing because i was like paranoid or something, there was a jeep behind me (i was in my friend's garage) and i thought i was part of it, like stuck inside of the jeep, so i did a complete 360 just looking around to actually see if i was part of the jeep, i knew that this wasnt possible but it still felt like i was part of it, after about 1-2 more minutes i kinda slowly snapped out of it and was just like, what the hell just happened, i kept questioning the legality of that stuff immediately after i tried it just because what it made me think/do... this stuff is sooooo crazy if you do it right, everyone should try it at least once, just make sure you're in a safe place to do it and i recommend sitting down... i've done it a total of 4 times and the last time was like 2 years ago, i cant handle the stuff, it's just too intense for me, i'll stick to the weed thank you