Great value for money
This lens is great considering it´s price tag. Very lightweight with long reach, ideal for nature or wildlife when travelling light. Sufficiently sharp (though not extraordinary), resistance to flare, bit softer at the tele end.
Not very fast, but solid course of the lens speed: f4 from 55 to 107mm, f4,5 from 110 to 190mm and f5,6 from 210mm; f5,8 only at the very end. So the best for portraits (shallow DOF) is to shoot at 190mm at f4,5, where the outcome is very decent.