Mine arrived today. Tan powder as everyone else has said. Clumpy, slightly damp possibly. Looks like a darker MDPV although doesn't smell the same. Scales measure to ±10mg, calibrated 6 months ago, so no guarantees of accuracy but this report shouldn't be far off. Mine also came from a website talking about how they finally had good 5-IAI, and which posted a scan of a (100MHz?) NMR report which they say backed up the fact it's 5-IAI. No reason to doubt the seller's trustworthiness above any others, and the package arrived promptly and well-packed with a printed label on the sample's bag saying what the contents were.
5mg oral in water: no effects at 15, 30, 45, 60 or 90 minutes. Baseline throughout.
10mg oral in water: again, no effects at 15, 30, 45, 60 or 90 minutes. Baseline throughout.
50mg oral in water: possibly a slight increase in body temp at 30 mins, head felt slightly fuzzy-edged, and this was pretty much it. Effectively baseline throughout, again.
120mg oral in water: slight alerts at 30 minutes (i.e. slight fuzzy head, slight temperature increase), blood pressure constant at 135/70 at 30, 60 and 90 minutes, pulse normal - 60-70bpm, possibly a tiny amount of pupil dilation but nothing to write home about. No other noticeable effects - no more than a +1 if that. Felt like I was back at baseline within 90 minutes.
200mg oral in water: slight alerts at 30 minutes again; headspace is again fuzzy. Body temp is again slightly elevated, and appetite is slightly diminished. Currently at the +45 minutes mark with noticeable pupil dilation, slight increase in the sensation of how warm my forearms are, and a slight softening of the sensation of touch. Am not expecting anything much positive from this. Hopefully there won't be too much if any of the insomnia reported by other users. Again, no more than a +1 by my (non-scientific) reckoning.
May try 300mg tomorrow.