The 70-300mm lens is a highly versatile option for sports and wildlife in particular and the market abounds with low cost choices that serve well. This lens is one of a different breed though, at a much higher price level and including, in Sony's jargon, their Optical Steady Shot mechanism.
Generally very good sharpness; Central CA almost eliminated; Ease of use; OSS system; Well made; Unique focal length for E mount
Edges soften as we zoom in; Edge CA high; High price