My own DSIP results were also unimpressive. Published dosing advice tends to stay very low, probably to avoid any risk of harm, so people often start well below 500 mcg. That caution might cause some to miss a useful higher amount. Similar conservative thinking around BPC-157 could be limiting what we see from that peptide as well.
I am an endurance athlete who got curious about DSIP because of claims it promotes deep sleep. I ran a seven-day self-trial and tracked everything quantitatively because that is how I evaluate new compounds. Bottom line: I would not suggest it to anyone; overall sleep quality dropped instead of rising.