I used this rubber during the speed glue era along with Sriver. These two rubbers were extremely popular during the speed glue era. The amount of control you had to ratio of speed and spin was perfect. The only problem is without speed glue you don't have enough speed.
Nowadays this rubber is very good for beginners and intermediate players wanting to develop their technique. I haven't seen to many players use this rubber any more. It use to be so popular! Those were the days...