I would agree with Ian the Aviator. Mine for a variety of reasons went part-time - I wouldn't recommend it at all. It needs a determined, consistent, focussed push. Although going into the FNPT2 is a fraction of the cost of the aeroplane, it saps confidence to take 2 steps forward only to discover on your next lesson a week later that you've gone 1 step back.
Over 5 months I did manage to complete with just over the syllabus 20 hours in the aeroplane to test - but 45 in the 'box' instead of 30. Largely because of the effects of doing it part-time - although I was a pretty crap student too
God bless my instructor - and that's another thing. You'll need a patient instructor too!