About the construction of the EF-series of Canon one can argue. Lenses should indeed be easy, but a little more than soft plastic should be able to expect already. At 100 euros, as in this case, but I really do not expect more.
This lens is a good replacement for the standard lens, and it is perfectly sharp in good lighting, and nearby objects. Perfect So for example if you want to photograph people. The major drawbacks are for me but when photographing distant objects, and if less light is available.
But I prefer a heavier lens into account, as I always carry around with me more. Therefore, this separates me "pretty special" lens unfortunately, and have returned to it again. It is a good property with a great price, with unfortunately a relatively narrow range.