Great product for a great price.
Excellent product for long range photography, good quality lens. Sigma lenses are renowned for their quality. The lens is used for specialised photography such as wildlife. The lens are the current series and worth buying through eBay where you will save over 40% of the standard retail if you buy it secondhand.
Good equipment at cheaper price
Good equipment. Cheaper then the shops. Good place to buy it. They have quite a few items. Have a look.