Oh goodness does it hurt!! The first time I used an epilator I was practically in tears. Imagine tiny tweezers pulling out the hairs on your legs all at once. Well after the third time I was like I can do this and I did. I can still feel a sting and numbs afterwards but it's not as bad as the first time. The best time to epilate is after a shower or bath dry the legs so the hair is soft and can be easily removed without much pain.
Now for me all the hairs was not removed at one stroke it takes more than once over an area.

The epilator will allow your hair to grow back finer and takes longer to grow back your hair compared to using a razor. My advice don't wait for your to grow too long before epilating, the longer the hair the more time it will take to remove.
It is worth epilating, try it for yourself go on!