Hi there,
This has been done to death over in the wanabees section for years so I strongly suggest you do a search. In summary from what I recall....
- a JAR compliant PPL does NOT exist, its just a marketing gimic
- you are effectively getting an FAA PPL with I think the JAR ground school and/or radio exams so that you can send off the paperwork when you get back to the UK and swap your FAA PPL for a JAA version
- the price you are paying is way more expensive than if you went to any of the thousands of US flight schools and asked for an FAA PPL and then found a local school back in blighty to sit the ground exams
Good luck.