I did it. I bought 3 Butterfly (?) shirt, 1 LI-Ning shirt and 1 Li-Ning short pants.
I don't have Butterfly shirts to compare, but I can tell you that LI-Ning shirts seem to be of better quality.
The Li-Ning short was a surprise because it looks good quality and has a really good fit. The only problem is that it has a yellow dragon, but I bought it in the sale, so I also have no complaints.
Regarding the sizes, it is a bit complicated because for the Butterfly that I bought one XL fits perfectly to me, one L fits perfectly and one L is a bit small.
Regarding the LI-Ning shirt, I bought size L, and fit well.
LI-Ning short 2XL is perfect.
I'm 1.73 mt. and 75kg, but I'm in good shape which means that I don't have a belly but my back and shoulders are a bit wide....the length of the shirts is ok to me...I will recommend to you if you are over 1.80 mt go for a XXL or bigger. size.
About the delivery, it took less than 2 weeks.
The shipment cost € 23
Every product comes with the brand label...I can't tell you if they are fake or not, but at least I think that LI-Ning shorts are real.