The actual product is very good apart from one grievous flaw. They look very good. They deflect water well.
The design includes a screw that sits under the front fork and prevents it being lifted as high as it should be. As a result it is difficult to arrange so that it doesn't rub on the wheel as it goes round.
The instruction include have pictures that have been very badly photocopied, so you can't see what they are showing. The YouTube video instructions however are excellent.