I have not used a panther, nor did I ever see one until the video potsed above, so I can not offer any coments from personal experience. But, based on my own personal use of kickers I would have some reservations.
First of all, I would prefer to use the steering wheel in the boat. I often have to make some very small corrections and can easily tweak the wheel. Looking at the video, it appeared that the motor moved quite fast from side to side. I could just see me zigzagging down the river.
Next, I have tried running with the main disconnected, or even in the all the way up position. Not a good approach. Having the main steer with the kicker works best for me. More positive steering and better control, especially if its windy out.
After you buy it, provide a test report to let us know how it works...