3 point spreader is next on my list to buy. Been borrowing them so far. Now then with that said I have learned several things from borrowing them. Plastic tub is the way to go. The pendulum mixing knocker deal in the bottom really helps. Wash and Rinse the spreader after each use. Do it really well after fertilizer use. Store in a dry location if at all possible.
Adjustable patterns and side to side directional control of spreading is nice. Easy to adjust for direct sizes of material being spread is needed.
Except for the pendulum item your listed item seems real nice. The pendulum is mentioned as a option or upgrade I think in what your listing.