I have one of there wet weather jackets and its ste. Wouldn't recommend them. I have a pair of shorts too and the elastic has gone on them. They lasted about 6 months.
I think the fact they are more likely found discounted in GO outdoors than at full price in a cyling shop is aenough of a flag for me to avoid them. Budget gear wise Decathlon stuff seems good enough for the money they charge.
My waterproof jacket I picked up is waterproof but some of the internal stiching has started to go. Saying that the stitching on the shorts I picked up same time has failed once on the side pull. Both bought at the NEC bike show last year. Cheap & cheerful.
Bought a windshell and the zip got stuck most times I used it due to poor design, in the end I got fed up and accidentally ripped off the zip when putting it down too hard.