Bell Riots kick off in 6 days, and we have a proto Borg queen coming online in 2024 just like that old gypsy woman said. Maybe we do live in the Trek universe.
I guess it just depends on how much of "you" is still in there and aware. If your consciousness and will are fully suppressed, yeah, it probably wouldn't seem all that bad.
OTOH, the body horror of the assimilation process could go either way. The nanoprobes could suppress the pain, or they could just paralyze you. I just try not to think about that lol.