Overall the best boxing game I've ever played.
The overall feeling of this game eclipses other previous boxing games in terms of raw trueness to the sport, In no other boxing game have I been able to full run past an opponent or use pivoting to line up gorgeous angles. Most other boxing games are essentially Tekken with a new flow and skin. Locked in lateral movements (as if a rope was tied between their hips) and having very specific animations tied to each punch really limits the spacing and angles aspect of the sweet science. Being physically simulated no two punches will really be the same. As foot position, angle and other smaller factors like chain of motion through the character may make or break your punch much like real life.
The graphics and overall presentation do need works as does the career mode as it's only a laundry list of opponents right now, however that is a small price to pay for what stands as the truest to life boxing game on the market currently. It's clear the dev has his head in the right place getting the core mechanics down solid first before committing to lesser but flashier things such as fancy graphics.
Please do be patient with the game, it's still a work in progress but what is there is easily the most realistic boxing game ever.