Its a budget lens. Its offering a wide focal range coverage, but at its price the image quality is going to be low. What is it though is cheap - its a good lens for starting out with if your not certain where you are going but want more zoom capabilities - that said I would get the sigma 70-300mm APO macro lens in that price area since you get the ability to do 2:1 macro (so you can fill the frame with an open flower - not good enough for proper bug macro, but more than capable of good flower sized object macro).
The lens that is 4 times the price is going to give you much better and sharper results as well as being built better = however its going to cost you 4 times as much.
I think the important thing is to work it out like this
1) what do you want the lens to do
2) how far financially are you willing to go with this hobby
3) how long can you wait/save for a better lens?