I'll bump this thread.. I've been trying to find out the same thing. I did check one out at the gun shop here and really liked it. The only problem was it's a fairly small place so I couldn't get a good feel for how good the glass was. I'm between the Vortex Razor HD Gen II or this sig... I know the vortex is probably the better all around package but I haven't seen that in person yet and and curious to how well the illumination works at low power ( 4.5 ) and I do not care for the Razor HDs reticles. I love the reticle on the sig and the illumination was probably the best out of anything I've checked out yet.