Easily the best MBT in the world. The technology is amazing. Unmanned turret is a big plus.
Russian usually build rugged weaponry that will work without complex maintenance. It look like a departure from that. We will see if it works in the long term.It isn't just the unmanned turret aspect which already solves many problems, but also the layered turret. It is more survivable and harder to mission kill than an equivalent that isn't. It is very clever tank design and justifies the generation gap.
On top of this, they corrected for new tank warfare where most tank threats are not sabots but missiles. Even then, the T-14 is at least as survivable and well protected against modern sabots as another MBT in that weight/armour class.
It is however extremely expensive and complex. That's a big drawback but the price to pay for certain capabilities. It's up to the Russians to consider if where they want them and how many. It's like a customised FN SCAR compared to the old reliable AK-47. Different tools for different tasks but having it and having the option is much better than not. Plus it's potentially exportable though I doubt any neutral or Russia friendly nation has it on its shopping list even if it could afford to buy.
Russian usually build rugged weaponry that will work without complex maintenance. It look like a departure from that. We will see if it works in the long term.