I bought a Speed E-Cart in April, and have been using it out here in South Africa about once a fortnight. Most others use PowaCaddy type motorized carts, and I haven't yet seen anyone else with a E-Cart.
It certainly does what it says on the box. It pulls my bag along just fine on the flat, needs a bit of assist on an upslope, is controllable on the downslope even if steep, and frequently amazes my fourball with the 15/30/60 yard autopilot feature! Oh, and I just love that "glove compartment".
But it could be even better, and I recommend some changes: (i) The push button speed control is very unfriendly. I desperately wish it had a rotary control, which you can adjust much more quickly, accurately and intuitively; (ii) I absolutely hate the automatic cutoff after approx 200 yards. It surprises me everytime, forcing me to break my stride, which is more annoying than it sounds; (iii) The soft start is a bit too soft; (iv) One of the 3 tyres needs inflating almost every 2 weeks -- design fault or defect? (v) It's actually quite heavy, and bulky when folded. Can't you make it lighter and more compact?
Thanks for reading!! BTW, my experience with Golfsmith was truly excellent.