I picked one of these units up a Princess Auto today, $50CDN. It is pretty easy to use, making adjustments easy from the drivers' seat. One thing that you have to be aware of, is that these units are Cat 2, so you need to get bushings to convert to Cat 1. The other thing is that each of attachment points, is 2" wide (wider than a std. top link), so you might need to check if that will fit. I needed to make a slight mod. to my tractor to get the end to fit.
Cheers,
Rob