OK. Most of the questions you're asking can be answered by reading reviews. Something to take note of: if your questions can be answered by reading reviews on a product, it's best to do that rather than ask in the forums.
Second, I don't know if it is past my bedtime or what, but I totally don't understand your question. You have put a photo of a vibrator and asked how does it feel in relation to an actual vagina. Maybe I'm misunderstanding the question, but a vibrator does not feel like an acutal vagina.
Or are you asking how does it feel INSIDE of a vagina?
You also say "are THEY worth the cost?" What they? You only put up one photo of ONE toy. I'm lost.