Because the soft box like an umbrella can be spanned, the building is really done very quickly. Makes everything even a fairly stable impression. I have the version with S-bayonet, which fits easily on the Walimex flash head. Only the outer diffuser cloth is a bit tight, what attaching Velcro something difficult (hence 1 star deduction). If this diffuser would be larger by 2 cm gäbs full 5 stars from me.