Pros: Relief, blessed relief.
Cons: Sorry, but they do smell like old people.
My right arm is practically useless - carpal tunnel, tennis elbow, bursitis in the shoulder, degenerative disc disease in the neck. The pain, at times, is excrutiating. Tylenol, alone, doesn't help, nor do Advil or Alleve. If I take a cocktail of these - 1 Alleve, 1Tylenol and 2 Ibuprofen, the pain goes away. For a few hours.
I find that applying these Salonpas on my arm and shoulder at bedtime lets me sleep without waking up in tears at 3:00 in the morning. I can sleep through the night and - wait for it - the pain is lessened the following day. Not gone, but lessened enough that I don't need a dangerous drug cocktail to get through the day. Now, I can't tell you the appropriate amount to use; I find 6 up the arm and shoulder work for me. That is a lot, of course, but preferable to the 4 NSAID's every 4 hours.
The ones at Wal-mart are different than the ones on Amazon. The Wal-mart ones are a rubber strip (like a Band-aid), while the ones I found on Amazon are cloth. I like the ones on Amazon; they stick better, and they're much cheaper. Amazon has a box of 120 smaller patches (2.56 in x 1.65 in) for $11.00 and change, versus the box of 2 larger patches at Wal-mart for $7.00 and change. I cut the Wal-mart ones down, since they are much bigger, but they're still a lot more expensive.