I bought one last year from B+H. I'm pretty disappointed with it actually. There are too many shortcomings, including no shutter release connection so it's difficult to use bulb mode. (I 3D printed an adapter but it doesn't really work too well.)
Also, the image area is smaller than the typical "6x12" — it's more like 5x10.
I realize that it's a Holga and the limitations are the point, but with 612 you only get 6 shots so the film cost isn't really justified for me. Some people online have had great results though.
I am thinking of modding mine to mount a better lens/shutter.