This is an excellent lens for the money. At 10mm (F3.5( it was slightly soft but after 11mm the images were very sharp (F.4 and up). The quality and feel of this lens is really nice. It is a nice fit and nice price for my 7D.
Light lens compared to my 16-35mm; nice color and decent low light performance; nice build quality
Little soft at 10mm but sharpens quickly above 11mm