I was looking for a cheap 2nd hand flash - could not find anything locally, so I went and purchased this flash new.
I already have the 580exII, which is my main flash. The Nissin I was able to use as a slave and the 580exII fired it as the Master.
I went for the smaller flash and I am really happy with it (for what I want to use if for). It is easy to use and understand. I will probably use this as a travel flash and leave the 580exII home.
Long term I don't know, but I am pretty happy with it. I am no expert with flashes, but I am starting to tinker and learn stuff. Going to dabble in portrait work, macros etc.