I have them all except the latest, Zatanna. First of all, they are expensive at full retail (which is how I used to buy them, thinking the LCS might have better paint ops). I buy them online or on ebay now.
As mentioned, the paint ops can be quite variable. Not horrible and disfiguring but diappointing at times. HAving said that though, I've been lucky. My Wonder woman is good, but Poison is excellent and certainly not the horror story that some have outlined. I was worried about Supergirl also, but mine is great. The whole pose and playfulness of that bust is great.
Only recently, I've been disappointed by the Powergirl. I have two of them, both of them exhibit disappointing paint ops. I might buy another one down the road sometime.
So, I order mine online, usually since the ES are so high now, I can wait 3 months and get two at a time.
I'm really looking forward to Batgirl and Donna Troy. Will get them all though since I have the entire collection so far. Then, after that, I'll stop. I guess I'm a Hughes purist. Looking forward to displaying the busts with the SS Marvel women. (Some ono, brah)