This flash works ok in ttl mode, lots of nice controls
very difficult to deal with lack of angles between straight forward and straight up - just a rediculous omission
the flash is a bit large and not as easy to manage
when the flash is busy zooming, it will not let you take a photo, good photos have been missed in the process
once i opened the pouch it came with and somehow the battery door had come loose on its own, not sure how to put it back without breaking it.
the first one i had, i had it in my front pocket and fell backwards. the flash fell out of my pocket when i hit the ground and would not work again, even though there was no cosmetic damage. (yeah i bought another because i needed a ttl flash and couldnt afford the oem, but now i think i might have to reconsider that notion)
not one of sigmas finer moments.