I had a d-14 with the 3 pt conversion.
friend had a d-14 with the worksaver kit.
I liked the kit, seamed to me to be stronger.
Of course together we had a great deal of the equipment made for the snap couple. It worked good if you had it and you did not have to worry with people borrowing the equipment because it would not fit there tractors.
Note: the kit is heavy and has to be taken off on a stand, otherwise its hard to get back on by yourself.