It can definitely be addictive, and have physical withdrawal symptoms. Certainly nowhere near to the extent of 7OH and similar products, but I can say as someone who was taking upwards of 30gpd for much of the last 5+ years, it is addictive. The fact that I've been on some opioid or another for most of the time since I was a teenager probably makes me more prone to it.
Even tapering down to 15 grams was extremely difficult for me. I'm now down to one dose of 5gpd and I can probably start taking regular breaks soon. I think most people will find it easier than traditional opioids, but don't underestimate it if you are a heavy user. I experienced most of the typical opioid withdrawal symptoms to varying degrees, with some symptoms that felt a bit like SSRI withdrawal.
I've taken enough of it for long enough that it has started to effect my health. If it were simple for me to quit CT, I would. I can barely look in the mirror because my skin is gross. Its quite possibly making my vision worse, and while my organs are mostly fine, being constantly dehydrated from heavy use during that 30gpd period did put a lot of stress on my body. Its basically impossible to properly hydrate when you're taking that much throughout the day.
That being said, its absolutely possible to use it either recreationally or medically without developing a serious addiction. I ended up like this for my own reasons, but I'm sure I'm not the only one with those kinds of reasons.
"Feel free" products are low dose and overpriced so you're rather unlikely to get addicted to those, at least not to the extent of anything other than feeling bad for a day.
I expect to get yelled at for fearmongering but that's absolutely not my intention here. I think most substances should be legal or at least legal-ish, and kratom is one of the safest ones out there. However in the spirit of harm reduction it IS worth pointing out that some people do struggle with this and it can get quite bad.