I was very worried about Junko. I had her pre-ordered at AmiAmi and, after hearing/viewing the release impressions/pictures, I didn't know what to expect. I was pleased when mine arrived with hair color close to the prototype and no noticeable flaws [that I can personally see, anyway].
I think the problem with Junko is that there's a varying level in her quality of control. Some are getting ones such as myself, while others apparently have a much darker hair color/shade, as well as other issues. Since it's not guaranteed that you'll receive one similar to mine, she can be difficult to recommend, but I really liked the way she turned out. I'd still like her hair to be lighter, but everything else is great. Especially her legs. HER LEGS!
As for Amazon, I'll definitely be pre-ordering her tonight from AmiAmi [I will post a 360 degree picture if I can find one!]. I didn't pre-order Cerberus yet, something is telling me to wait. I'll likely see what's unveiled at Wonderfes in the coming days and then decide.