well at least for me in my mind it is. I have a friend who called me and asked if I wanted a 580exII and I was like, well sure who wouldnt? He told me he would trade me my 550ex for the 580 and I told him sure whats the catch. He said "well you know me and the wife are finanacially going to the shitter, so I figured as long as I was losing everything I charged up my dell card and bought some stuff and the flash. I figured I got it to trade you since you would make more use than me and that I want a flash but the 550 would do me fine" He also ordered teh tamron 10-24 that I am going to look to buy from him when he loses interest in photography. he always loses interest in stuff.