I bought a set when SFRC carried them. I liked the sight picture better than the magpul equivalent, and the have a CQB notch sight above the big aperture, which is a nice feature. Front sight can be adjusted without tools.
The rear sight has both large and small apertures, shaped in the traditional "L." This is both a pro and a con. The MAGPUL sights use a small aperture that rotates up into the larger aperture. While this saves space, a common problem is that the small aperture gets dislodged during firing, but does not drop fully out of the way. The result is that the sight picture is blocked. With the traditional L shape, this is not a problem. However, with the small aperture in the upright position, the large aperture sticks out to the rear, and the sight cannot be folded down.
Coloured models have a colored sight post - a tan sight's front post will also be tan. This can cause it to was out against the background. You'd have to paint it black or something.