I've looked online, but not seeing any actual reviews of how well these things work. One video shows the extra 12" of height and another shows some dude with their "beta" version, but nothing showing how they work in the real world. Seems like a massive upgrade for us BX folks:
hydrosplus.com
The two videos:
HydrosPlus Lift+ HPBX300-BM for the Kubota BX
The two videos: