I suspect I will be pondering about dress forms for a while before committing to purchase. It's just the way I am. Sadly all the drawing of opinions and options can lead me to analysis paralysis and at some point I'll realize that I have known what I wanted for a month and a half and it is time to admit it to myself. I still have a lot of work to do to find room for it anyhow.
Reviews seem to be somewhat mixed. The process is that you sew the cover until it fits you so close you can't breathe and then wrestle the dummy into it. The foam compresses and fills the cover and ta-da, you have a clone of yourself. But... some people have found the cover stretches a bit over time so it's not accurate any more. Small busted women have needed to take a knife to the breasts because it's too much and compresses in weird ways. Elegantly Basted bought this last year and I found her struggles educational, as was Diary of a Renaissance Seamstress. I think I could be up for the fitting, my bust is probably big enough I don't have to worry about it escaping to the sides or cutting them off to make them softer like DofaRS did to fit her corsets. But... I can't do pants or a bathing suit or anything involving the crotch... I know I don't do a ton of that kind of sewing, but it seems like I might at some point and it's silly to limit options unless it really is the best option.
On Pattern Review, someone suggested buying a Roxy form and padding it out.