I was able to get out on Saturday for 5 hours. I did test my surfgate fully weighted and did get out for a surf. No catastrophes, so it was a success.
The results are pretty spectacular (I think).
Without the gate:
You can see the streams of water leaving the back of the boat and converging at the same point behind the boat. The weight is biased towards the driver or starboard side of the boat making the wake cleaner, this was the side that we were surfing. Total ballast was ~2525 lbs plus my girl, me and gear. So ~2900 total weight. The wake was pretty tall, but not very long and was also very steep. Speed was ~10 mph +/-
With the gate:
Same ballast and speed as described above. You can clearly see that the convergence of the wakes has been altered. The starboard side wake folds over the port side (or looks like it anyway). The clean water on the wake goes a lot further out back and the pocket has been drastically increased.
A few other observations...
While the gate worked flawlessly, the engine rpm had to be increased from ~2100 rpm to ~2200 rpm to achieve the same speed. The increased RPM should increase fuel consumption, but haven't put enough fuel through to say yet or how much. The gate creates more drag through the water that must be overcome. Low speed handling is effected, there is a 15" long paddle to turn against now. Neither of these are really issues that I am concerned about, just differences I noticed.
The surfgate improved the surfing experience more than I could have imagined. I like it.
The conditions were about as good as you could ask for on Last Mountain Lake.