I went after seeing how naturally my mom's friend turned out, and had it done too. Actually I already had double eyelids, and even in high school people asked if I had gotten double eyelid surgery, so in a way my eyes already looked a little like they had been done haha. I just made them a bit bigger. They were swollen for about half a year, but now they look natural. They do a good job with a natural style.
The cost was 4 to 5 years ago, so I don't really remember.