I wouldn't go as far as to say disaster.
I've still had longer than normal chain use with mine.

But everyone I know personally says they can be mucky (and that includes several professional fittings) and they still need re-filling regularly (unless you get the touring reservoir) so it doesn't save you from that. So for me it's not as clear cut as it is for other people, but I would never dis-regard other people's experiences or opinions.