I was sufficiently satisfied with the purchased copy that is almost a year to get into the acquisition of a second. Both easy to use, with performance that almost lifted out at the height of SB-900 (focal coverage limited to 24-105 against the SB-18-200 to 900), it has a feature that should be definitively adopted by other brands: the batteries fit all in the same direction, which avoids wasting time when it comes to replacing them. Returning to the reduced focal length coverage, it does not constitute a disability or a fault in the case of a flash dedicated to serving remote flash function it performs beautifully.