I've been to wonderful chiropractors and I've been to quacks. The good ones will discuss what's going on and individualize treatment.
The bad ones will kind of just do the same exact routine every time you go there and they'll do the same thing to everyone that goes there -- wham, bam, ty ma'am style -- get you in and out the door as quick as possible! They'll probably pop just about everything they can, which accomplishes not much of anything at all. I guess you'd call that the bruteforce method of chiropracty?
However, a single bad adjustment can painfully linger for weeks.
A good chiropractor for me was Dr. Blake Meyer at DSMCore. He would take a whole half hour and do some targeted deep tissue glute massage and nerve flossing that really helped my sciatica. Then finish up with a few minor adjustments and send me on my way, walking a little taller and straighter and with appreciably less sciatic pain. But don't expect miracles.
I tried a physical therapist near his office but she pushed me too far, too quick and made it worse. So I just stuck with Bob(RIP) and Brad on YouTube and did it at my own pace.