tabletenniswest on 6/10/2015
By far the best plastic ball I've used to date. Feels heavier than DHS and XuShaoFa 40+ Balls and the bounce is closer to the Celluloid balls. I didnt find myself having to 'think' about adjusting to the plastic ball.
regmonta on 2/5/2017
The ball is supposed to weigh 2.7g (according to ITTF). Stiga OPTIMUM 40+ is significantly heavier than ideal.
Weight: 2.8 +/- 0.02g (ITTF requires: 2.67-2.77g starting in 2016, used to be 2.82 max before).
Belisar on 9/24/2015
Used in a local league match. Had 2 boxes of 3 and struggled to find one which was truly round. I would not describe them as eggs but there was certainly a wobble. In terms of hardness and speed had no issues at all, from those perspectives they played really well. We broke 1 in 3 hours of play (not through a top edge). I think I would really like these if they could improve the roundness.