I have this one, its a great flash, when Merovingian says awful manual I think he means the documentation is bad.
Its a complex flash and some things are little tricky to understand but overall its a great flash. I got my for £80 off ebay which I thought was a steal.
Oh and it ticks all the boxes, optical flash, maual settings down to 1/128th, full tilt/swivle head, words with ebay triggers, is powerful..