For quite a while now, I've considered them to be a poor investment, given that the interest rate isn't all that good, and that some of the mediocre interest rate goes to paying the larger prizes which I would almost certainly not win.
The possibility of winning a largish cash prize, though, is quite appealing!
I've been wondering, those folks who have PMs, what percentage of their overall savings do they represent?

and also some interest on what you've put away.