I just bought and installed the XS big got sights on my xd9 and I freakin love them. I never understood what people were talking about when they said that the XS sights are "faster", but after installing them I completely understand them. They are fast to acquire in your sight picture, bright during the day because of the large white area around the green tritium vial, and nice and bright at night. Just my opinion.
"There are only two things in this world that I hate, intolerance of other cultures and the dutch"