Oh God, that's awful. It immediately makes me think of late night infomercials. In fact you could probably do a mashup of that voiceover on a video of a sexy callgirl and nobody would know the difference!
To be fair to B&W, they don't have the large marketing budgets that the other telcos have...I think they have done the right thing in sinking the money into airtime, not production. It's simple, easy to understand etc etc. While not as clever as 2Degrees latest ads...I think they do the job.