GAF, that NPPL is similar to our Recreational Pilot Permit. The original idea was to use it for local flying only, in light A/C with only one passenger. As such, it's fairly safe but only if the pilot stays close to base since there's no solo cross-country and no instrument time. My biggest gripe is that they removed the requirement that the pilot stay within 25 miles of the departure airport, so one could conceivably get in a heap of trouble fairly quickly. The best advice heard 'round here is only do it for medical reasons and take the full PPL sylabus regardless.