I go tthis today and took quite a few shots and I am very pleased. As long as I dont go over 1/250 shutter speed there are no issues, as I go over it gets out of sync a bit, maybe its something Im missing but either way the flash is bright and has really added a lot to the pictures I am taking. Im sure spending $400+ on a flash has some benefits, but for the price you cant beat this flash. The pull out diffuser works well too. Would recommend to anyone looking to get a good flash for a good price. 

Question: What is the flash?
Answer: I go tthis today and took quite a few shots and am very pleased