I have just finished my week 6 day 2 run (3.9k) which was thoroughly enjoyable - and slightly nerve racking when I realised it is the last run with walking breaks! Urm....
Still, the plan has worked so far (I never thought I would have done w5d3 until I did) so holding (very tightly) onto that thought.
For the beginners - if you are anything like me you felt like dying after week 1, day 1, run 1 - keep going (slowly!) and focus on technique rather than speed - snails pace if needs be. Believe me - it all comes together and stamina _is_ being built whilst you run slow.
Keep going! :-).