Different Body Kit Materials

[new big400]

I am looking to buy a new front bumper and was wondering the pros and cons of different materials.The one Im looking at is fiberglass and I know alot of people frown on fiberglass why is this?This is the bumper.http://www.lextasy.com/lexus_wise_aristo_lexus_bumper_1380_prd1.htm

[TurboGS300]

Fiberglass cracks very easy, is not very flexible(hence cracks). Urethane is what the OEM is and it's by far the best material out there. Although, there is a new fiberglass mix that is very flexible. Almost no one uses it yet. <_< Also you need to be really careful on the body kits as sometimes they are not usually perfectly symmetrical( hence may require a bit of sanding or grinding to fit properly.

[Neo]

From the description, it says Wise style. I assume this is a Wise knock-off? Is the bumper fiberglass or FRP?