It is definitely not worthy of the EX marking, and it is hardly worth its money. It’s definitely not worth taking as a replacement for the Canon 18-55 IS kit, it’s just giving money for a larger and heavier lens with virtually no gain in quality or ease of use. In this situation, it is better to spend money on an Elco zoom or buy a fixed focal lens for the price of this sigma.
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review
Canon EF 50mm f/1.8 II Fixed Lens - Discontinued by Manufacturer
93 Review
Black Canon EF 24-105mm f/4L IS II USM Lens - Model 1380C002
78 Review
New Nikon 18-105mm Vibration Reduction 📷 Zoom Lens with Auto Focus for Nikon DSLRs
104 Review