Is getting a 1/4 gram worth it? how close to a marjuana high is it? and how long should a 1/4 of a gram last?
1/4 gram will last you quite a while if you only vaporize it. A threshold dose is about 1 milligram. With 250 mgs per 1/4 gram, you're looking a whole lot of highs for little $.
IME, the effect is fairly close to a real cannabis high, but shorter in duration. It's not as cloudy as MJ. You can take it early in the day without it fuzzing you out too much. It's very stimulating, and is quite "cerebral", at least in my experience. Ideas flash by at breakneck speeds, and I often find myself overwhelmed with too many thoughts. Take too much, and you may feel like the world is getting "squishy". Big body rush, and it's like you're about to phase out of this dimension entirely. But that's when you take too much. Also, 018 can make you dizzy, more so than pot.
Paranoia is present, but it's not as bad as what pot can produce at the same level.
If you don't have a scale, you will definitely need a measuring device of some kind. I use a tiny spoon made from a thin strip of plastic with a shallow hole carved in the end. I very rarely overdose this way, and the only times I did OD was when I knew I got a little too much in the pipe.
I forgot to ask.: can you eat jwh-018? is it as good as smoking it?
Yes, you can, but it can take up to 10x the amount to get there. Last time I tried, I actually didn't peak until about 5 hours later. Thank goodness I didn't take too much; it could have been a Hellride for sure.