The average chiropractor will make you better after two to six weeks of visits. If you don't go to the chiropractor, your back will take about two to six weeks to get better. The point isn't whether chiropractors can "make your back pain better". Obviously people visit chiropractors and most of them get better. The point is whether the improvement that you experience is greater than the improvement you would have experienced if you'd done nothing.

Retraction: I was comparing announced list prices 1 month ago, not on-the-street prices today. The Mac Mini is still a hell of a deal, but it looks like a MacBook "Apple Tax" is around 15% over the TravelMate.