Have only used my Powakaddy once but found it a good companion. I find the balance a little sensitive. Would highly recommend to someone who prefers to walk the course.
I have used the FX3 for about 6 rounds and am happy with the ease of use and ample battery power. I have enjoyed walking 18 holes without a pull cart.
The guys at the golf vault are awesome to deal with and the Powakaddy fx3 that I purchased is an excellent product, very well built and I love how small it folds down.