SWIM has tried extracting DXM a few times but it always seemed to yield 50-60% and he had gotten used to the body load and taste of the syrup to a degree, plus the nausea was nearly identical with syrup or extract. Mostly he used syrup.
In any case he's done ~20 times and a while back swore it off. It can be fun but that's about it, kinda like heroin or crack (maybe that's a stretch)
300-400mg gives you only a mild mental effect yet a strong body load. It can be lots of fun the first few times but seems to get old fast.
450-500 makes you a lazy blob and a robo-walker, mild CEVs and double vision and a mild-medium headspace change are also evident
The strongest he's had was on 525mg and he was thinking weird thoughts and had a walk to the bathroom in the dark he'll never forget. Seeing from a foot or two behind his head and the world seen like through a telescope backwards. He tried to repeat the experience 2 times after that going up to 600mg but it seemed to have lost it's magic.
>600mg is appearently an intense trip where there can be ego loss in addition to loss of visual processing and near-paralysis, but this isn't a 45-60 minute k-hole this is 8 or more hours! SWIM's roomie did it and he was 100% sure he died and was playing his life like a First-Person-Shooter in terror until he passed out.
Pros:
Something to try, can be slightly psychedelic
Cons:
Frequent large doses can possibly cause lesions in the brain. Recommended: 1 week between light doses, 2 weeks between medium doses, 3 weeks between strong doses
REALLY long with baseline coming no sooner than 10 hours after dosing, ofter 16 hours plus where effects are felt
Doing anything at the psychedelic doses is super difficult.
Strong doses can be scary and overwhelming and once again LONG.
Can be addicting, be careful
Loses it's magic quickly
SWIM swore it off so it he may be a bit biased.
Good luck