Excerpt: The older 54 series shoe mount flashes (54MZ3 and 54MZ4) can be had for a steal on the used market. Slap a standard show on the flash and it'll work as a great off camera flash--very powerful and configurable. The standard shoe also allows for very effective on camera operation in either manual or auto mode. Great deal to provide that flexibility and functionality. The only improvement would be the strength of the shoe mount.
Excerpt: I'm a Sony owner/user and wanted to use my Metz flash head off camera with a wireless receiver and, therefore, needed a foot with a standard ISO fitting. This shoe adapter worked perfectly for this My only criticism is that the adapter is slightly narrower than the bottom of my flash, so there is about a 1/8" gap after it locks into place and you can see the circuit board. I'd be far more concerned if I were going to permanently leave this adapter on my flash head.
Pros: Easy To Pack, Easy to Use, Lightweight, Reliable