Thought long about which flash bracket and adapter should I buy myself. The choice is then dropped to the Phottix Speed Mount, not least because of the very popular Bowen port and the flexibility of the adapter with respect to the used flash. It can be very easily adapted to the corresponding flash (in my case Canon Speedlite 580EX II and 430EX-II). The adapter makes a stable impression and the softbox can be attached easily and firmly fixed to the bracket.
The only downer and therefore "only" 4 stars: The Panhead on the adapter and its attachment writing are not very reassuring. But if you use it on an additional Neiger (eg Manfrotto), that's no problem.
I'll probably still set a second adapter, since the product has convinced me and I can then use two soft boxes simultaneously. Top product at a low price. Phottix has again got it right.
