This lens outperforms the Canon EF 75-300mm versions with and without USM, and even the IS version.
It even seems slightly sharper than the Canon EF 100-300mm.
It's especially sharp when used on macro, with slight softness at 300mm and distant contrasty subjects, f.example dark tree branches against a white sky, but that's a torture test even for the best of lenses.
It's excellent value for money, and as stated, outperforms brand lenses 2-3 times the price.
Now if it would only focus a little faster it'd be really good, cause it focuses a bit slow.
Comes with a hood.