The epilator hurt like blazes the first few times I used it, but I found that if I used it on regrowth it was nothing like so bad, because it only hurts when it's pulling a hair. If it's pulling a lot of hairs all at the same time, it hurts a lot. But if it's only pulling a few (because the others haven't all grown back yet) then it's much easier to deal with.
And after many uses, it DOES get easier, although if I let everything grow like blackberry bushes all through winter and THEN use it, it hurts almost as much again.
I'm finding underarms and bikini area are no longer a problem - doesn't hurt at all now.
If it's a big problem, try a stiff drink first. But only one, so you don't snag your skin through being too relaxed!
And there's nothing like motivation - getting a phone call from a friend to meet at the beach in five minutes and you pull on your swimsuit to discover you look like Mrs Tiggywinkle - I whip out the epilator and mow furiously. Any pain - the salt water will fix that fast.
Marg