Even so, the price / quality ratio is exceptional. Compared to my previous Sigma 70-300 f4-5.6, the day and night. Quick AF, net full aperture at all focal lengths and effective stabilizer. I even tried to macro successfully (with 70D). While it's not really made for that (the distance from minimum focus does not get close enough for very high magnifications), I could still make cool pictures in a croppant bit for larger image, this being made possible by the good resolution of that objective even 250 mm f / 5.6.
1/4 of the price of the first zoom red-white-black gun, but certainly not 1/4 of quality.