I have been using a Tract Toric 4.5-30X56 ELR MRAD on a custom .308 for a few years now. Thankfully you don't have to apply for an import permit anymore, to get one.
The optic I have that I compare it to is my Nightforce NXS 8-32X50 (Mil-XT reticle), and they are close in price.
The Tract adjustment knobs are bigger and actuate differently. Both rotate smoothly with discernable clicks when adjusting. Both have good parallax adjustment knobs and focus rings. The Tracts are ever so slightly smoother. The glass seems very comparable, with my preference being the Tract, however that probably has more to do with it being a 56mm vs a 50mm objective, and also having a bigger tube size. The reticles are almost identical, both in Mils.
It performed perfectly in temperatures below -25 C. I can't speak to toughness as I haven't abused it, but the Nightforce seems more robust to me.
It was a distinct improvement on the Vortex Viper HST 6-24X50 that performed reliably for many years (and is now on a different rifle), but at double the price I would hope so.
I haven't had any issues with the Tract Toric, so I can't speak to that side of Tract's customer service. The communication during the purchasing and import/export time was very good.
I think you will be very happy with your purchase. I don't regret mine.
I have good feeling of this purchase, your feedback is very motivating lol, thanks