Kratom is most definitely a subtle drug, and this is coming from a 10 month, once-daily user. Granted, I've never dosed over 4 grams (up to 5 on a handful of times), to avoid ruining a perfectly good medicinal substance. I didn't realize how subtle the effects were until I took hydrocodone again. Real opiates, such as hydro, give "true" euphoria, it's hard to explain. Real opiates (derived from p. somniferum) blast you away with in-your-face euphoria, which can be chased as far as your wallet will allow. Kratom is not that substance, it has more of a background high, gently adding stimulation and positivity to your day.
1 gram is only equivalent to about 3.75mg hydrocodone, and you can only dose up to about 8 grams before you hit the Kratom nausea ceiling.
8g of Kratom ~= 30mg hydrocodone, which is quite weak for anyone with any type of opiate tolerance. I have a mild opioid tolerance, and only got a good opioid high the first few times of using daily.