IIRC, they are only reporting to 2 bureaus.
And there was a point where it was taking them months to report (as in 6+). Not sure if that's gotten better or not. That situation was under Doug Fuller's regime.
I'm a current borrower. They report only to TransUnion and Experian, not to Equifax. They are generally 120 days behind, and don't update that you paid off (just stop reporting) unless you dispute via the two agencies.
FWIW, Lending Club is 90 days behind and only report to TransUnion and Experian.