My Zen VDSL-2 FTTC has been rock steady for 17 days, have only been with Zen since 15th Dec and fully to expectation had regular DLM intervention to get back to 3dB SNRM after migration plus my manual re-synch's with staged modem clamping to achieve DS G.Inp re-tx low profile.
Only unusal occurance I have noted with Zen with my particular bridged setup is after some of the more recent DLM re-synch's the PPP session appears not to be re-established on the router (red internet LED), un-plugging/re-connecting the ethernet cable from modem to router immediately re-establishes PPP session.
Had exactly the same modem/router setup with Plusnet and never observed this behavour.
Not complaining, just an observation, still 100% happy with Zen to date and so glad to escape from Plusnet.