I have not ordered one but i know some people, it is really expensive, and i heard that the time it took to get it was long too.
I'm planning to get a custom double-neck from them. I have a quote off their Online Custom Quote Calculator and I asked at the local ESP dealer and they said custom orders take an average of like 8 months (which is also what their website suggests).
"Would you tell Picasso to sell his guitars?" - Jack Black

Quote by Lt. Shinysides

my dick is generally better than yours, and is more pleasing to look at and hold.
your dick understands and accepts this, and is willing to just move on.
Yeah but the site charges an automatic price for certain things...like $1000 for custom anything. Which is probably a lot more than it'll end up being.

Although it's probably safe to say it'll be cheaper going to a luthier, rather than using a major company's custom shop.
Dimebag is overrated. Sue me.
I'd just let Perry Ormsby make a guitar of my dreams...check his stuff out in the Build section