Yeah, it always depends on the end result. With western porn actresses (Or famous people in general.) it often seems like they're going: "No no, this is completly fine. Now do more!"
Let me present the ultimate fake girl Yuria Satomi.
You could tell me that she's a realdoll that magically came to life, and I'd have no trouble believing you.
She probably had every possible body part done at some point, but the end result is still good.
On the other side of the spectrum you have this monstrosity.
She's only 9 years older than Yuria.
Let's hope Yuria never ends up like this.
Edit: Okay, let's be honest. There were days when I was turned on by Fujiko's grotesque look and watched her movies. But still...