  We highlight the advances and difficulties in understanding PSR B1828-11,
which undergoes long-term periodic modulations in its timing and pulse shape
over several years. A model comparison of precession and magnetospheric
switching models based on the long-term modulation data favours the former; we
discuss the implications of this in the context of short timescale switching
observed in this pulsar. Furthermore, we highlight the difficulties this pulsar
poses for our understanding of pulsars due to the increasing rate of the
modulation period and its behaviour during a recent glitch.
