I used to live down the street from Nails World. I've been going there for 3 years now and I recently moved to NW Vegas--and drive 30 minutes each way, just to go there!
It is totally worth it! They take their time, make things as perfect as possible for you. They are really nice and do a great job. They believe in taking their time and not rushing you out the door and taking your money.
If you want to relax and be pampered, go here! But if you just need a quick fill and want a cheap, in and out place, go someplace else. I trust them, they do a great job every time, and I won't trust anyone else!