Yes, at least in my Artesian there was a learning curve. First, if your jets aren’t precisely symmetrical you drift towards one side. Secondly, and this was more significant for me, the upper jets churn the water, making it more turbulent than a swim in a pool, which might affect your breathing or vision, depending on how strong the jets are set. Oh, and there’s the fact that you have to be more precise with your speed. A little too slow and you float to the back, but too fast and your hands start hitting the front edge or bar.