HWD , after using the flight planning software on navbox you just click the automatic link to avbrief to download notams and met. You need to preregister first with Avbrief. Info is presented textually, although avbrief also have a geographical presentation arrangement and link with Notamplot, which again requires pre registration.(no big deal) Services provided depend on whether you register as a guest or paid up member at differing levels depending on info required. Personally I tend to use Navbox initially for the flight planning element and then simply log on separately to Avbrief for the rest, for no particular reason other than habit although I do find the avbrief presentation is clearer through their own website rather than via the navbox programme. Of course using the sites separately involves some duplication of input so takes a little longer than going solely through navbox alone.
Mike