I bought a 'Go' second hand about 5 years ago. I only have strip and square dies (the ones that came with it). I do use it and one day will also buy the rag quilt die, so I can avoid all the snipping. I also plan to buy the drunkards path dies.
I do not do applique.
I do not know that I would buy the 'Baby', it is just a bit too small for me.