Has anyone had any experience with the twister foam tires from http://twister-tires.com

Im looking to fit these on my 1:10 scale serpent car ( even though im thinking of switching to mugen ).

I see that they have very good pricing (Look at those quantity princing ) but im also wondering about the quality.

In the past i have driven several different brands like jaco , grp , enetti etc.

I see they already won some championships with these twister tires but im wondering if anyone here has experiences with these tires ..