I know, I consulted for one.

That said, it wasn't reliable.

One day: two sw engineers onsite, we recreated the problem, they went back to yake care of it.

Another day: what seemed like a student from a third world country on a very cheap helpdesk asking irrelevant questions instead of reading the description.

Another day again: answer by "head of <something>" acknowledging the issue and pointing to a fix coming <at some specified time>, only IIRC the fix didn't arrive, at least not at the time that person said.