I gave plenty of thought to doing my PPL in Florida or here. On face value it's cheaper in the States, but as mentioned, there are other things to consider, flights over there, a visa, plenty of studying before actually flying.
I decided it was a better idea for me to study here. Main reasons, it fits around my work life, it allowed me to go flying regularly while under training, I will be prepared for UK flying and wx conditions.
IMHO spending a few months, or a couple of years to get your PPL is great. It allows me time between lessons to digest and reflect. Next time round I've already spent a week hammering the flaws in my head out and am keen to make less mistakes (Don't turn the damn control column when turning, 33 hours later and I still find myself tempted to do that
). I spend the time inbetween on the normal aviation forums. It all helps with the 'experience' which you'll lose out on in a 3 week course.