I'm interested in putting tritium night sights on my G17. Looking through the forum I ran across a link for Glock's sights, which look to be the closest to the stock sights in terms of size and shape, and the least expensive option for night sights: http://www.gtdist.com/ProductDetail.aspx?PartNumber=GLOCK-NSXXXX But... In the threads with people discussing night sights - I don't see Glocks ever mentioned as a favorite. So my question is - why not? What are they lacking that have most folks preferring other brands?