After a long 18 month journey I would now consider myself as good as I will get. However, I am not the same as before the injury, here are a few observations:
The Achilles tendon post repair is around twice as thick as by unrepaired tendon. My calf muscle is also a slightly different shape. This may be due to the fact that the claf muscle is now longer due to a shortened Achilles tendon, or it may be due to the fact that it is less strong (which it is in the upper ranges of movement).
For example extending my calf during a 1 legged heal raise is still not as easy as with my left foot. However, my legs are now very equal in terms of endurance, for example if I walk for 3 hours carrying a 10 kg ruck suck, and a 15kg child on my shoulders, it is my "good" leg that aches the next day. So the repair has resulted in a leg that is pretty good.
My repaired leg suffers from almost zero fatigue. Although my good leg still gets tiered in the same way as it used to my repaired leg rarely aches. This is actually quite handy.
After months of taking easy on my repaired leg, I still lack confidence, which is a sub-conscious thing as much as it is conscious. For example when jumping off things I tend to put more weight on my good leg, which is not good and may lead to injury of the "good" leg. When running I have learnt to overcome this habit, but it still catches me out from time to time.