Impressed thus far - SIG SAUER Tango6 3-18x44mm Rifle Scope

Relatively new entry into the long range day optic field so I had my misgivings of being an early adopter but OP had a kicking deal that was just too good to pass up. This optic replaced a Vortex 4-16 PST because I was looking for a little more magnification without sacrificing on the lower side. The 3-18 magnification optics fit the bill perfectly but as in everything there are trade offs.
First the cons, or, really just things you should be aware of. This is quite a long scope. About 2-3" longer overall than the Vortex it replaced. The eyepiece is also quite substantial with almost 4" of eye relief. The eye box is a little less forgiving but once you get used to it is not a big issue. The power ring is on the large diameter of the eyepiece. This will affect how you mount it and your ring height obviously. If you use the new whiz bang chassis stocks with their forty-eleven adjustments it's probably a non-issue but traditional stocks may require some planning. I clamped my rail mount into the mill and reduced the height on the back end to allow me to use 1) lower rings and 2) push the scope forward another half inch.
Weight is stout but no different than comparable optics.
The objective is threaded but as of yet there no anti-reflective devices or specific accessories available. I imagine that given Sig took the time to list this spec in their literature they are forthcoming.

The pros can start with how great the glass is. Very, very clear and a huge upgrade to the Vortex even though the Sig has a slightly smaller objective.
The eyepiece as mentioned is substantial but here is where it's a good thing--It gives a huge sight picture when on the stick. The focus adjustment is quick to use and has an indexing mark for record.
Elevation and wind age adjustments are functional and work, not much to say about them. The free ballistic turret is a great service. I've not got mine yet but I ordered the same day the optic arrived. If I can remember I'll post an update on how well their software tracked my bullet info.
The reticle is nice and uncluttered with no extraneous numbers, dots or dashes to distract your sight picture. The center dot allows a precise alignment on target. Illumination is easy to control on the left side.

All in all I like the scope even more the more I use it.