Looks awesome! I was worried about our pond at first too. We were losing quite a bit of water the first year it seemed like. My theory is the ground between the bottom of the pond and the water table finally saturated and the level was more constant after that.
One thing to keep in mind is I regularly saw an inch per day in evaporation on the hot windy days. Two weeks of no rain and you'd lose a foot of water. We finally tapped into our irrigation well and ran a line to the pond and made an aerator. That helped stabilize the levels quite a bit and the aeration was a bonus.
Thanks. Calling for some rain here Sunday and 5-8" of snow on Monday at the moment. With the ground frozen it should provide a little water runoff. Would be great if the bottom of the pond would fill before the heavier spring rains to prevent some silt in during the fill.