New offseason training board

I have recently ordered and new off season training board first used by snow boarders. Its called the Tierney board. It is a type of modified skateboard used more for downhill. This board gives you the feel of carving as you bank and carve down the hill. I found it most usefull for crosstraining riding switch. Even more than the balance boards, this board will strangthen you ankles and calves. After just a few minutes I could feel it in my legs. I workout daily but am going to add this creative board as a weekly routine. I would like to know if anyone else has used this board and how do they like it? Here is the link.