  The outbursts of WZ Sge stars (or TOADs), are compared to those seen in the
(soft) X-ray transients. Both types of outbursts exhibit strong similarities:
large amplitudes, long recurrence times, occurrence of superhumps, and of
rebrightenings or reflares at the end or just after the main outburst. This
suggests that the same kind of mechanism is at work to produce these outbursts.
I also briefly discuss their differences and whether superoutbursts may exist
among the very long (>month) outbursts in U Gem stars.
