Eva, Lola or Monica? (Pocket Pussy's)

So I'm looking at geeting my first pocket pussy/realistic vagina. Eva is the cheapest and Monica is the most expensive. Has anybody used all three or maybe two or even just one and can recommend which I should get? Is Monica worth the extra over the other two? Does one offer more pleasure than the other or is Monica simply a little longer?

Also, how vital is it to use renewer powder with these?

Thanks in advance for your response.