I gave it a go last year and was terribly disappointed with the results…
Ordered a selection pack of what was supposed to be all the "best" strains for my particular problems (pain, energy levels) and cautiously started experimenting, shifting through different types, dosages etc with sufficient gaps between that I didn't build any tolerance or anything.
Was optimistic at first but quickly discovered that I was getting nothing out of it whatsoever, save a lighter wallet! Better results from phenibut lol even caffeine is preferable! Kratom tastes rank, no matter how you ingest it; even in capsules it seemed to produce in me the most horrific, bitter burps an hour or so after swallowing them.
Dunno if I ordered from the wrong place (apparently renowned and well-reviewed), had a crappy batch of several different items or if my personal chemistry just doesn't match, but I found it a waste of time and money.
Lots of other people swear it works for them though! I'm quite envious and hope that it works for you if you do try it
Good luck, whatever you try and do!