TooTicky - the Babyliss isn't that expensive any more, just googled it and came up with various prices, so if you were thinking of getting one, then it would pay to shop around.
Blondilocks - it works by gently buffing the hairs off the legs - it has 2 circular discs that counter-rotate. It is in no way like 'sanding'.
Wellikins - It's a shame you thought the Babyliss was a waste of money. It's never caused me to have any sort of rash and I've got extremely sensitive skin. Could the rash have been caused by pressing it onto the skin, as it's supposed to be touched very lightly, almost 'hovering' over the skin. Not heard of silkymitts before, so can't comment on those, may give them a try.
Uberalicelongbottom - I'm sorry, but if you've never used the Simply Smooth before then I don't understand how you can say it's like shaving in terms of regrowth (it isn't at all), or that she'll end up hairier in the long run. This is simply incorrect. When I used to shave, I'd have regrowth appearing within 10 hours or so. With the simply smooth, I have no regrowth for days, and when it does regrow, it is less stubbly than after shaving, and in a few patches no hairs have grown back at all since I began using it last Xmas. I suppose it does look a bit like a sander - but it's not, I mean, sanding is rough isn't it? This is like the name suggests - smooth!