I tried the spinpips with a special sponge for chopping, known as Spinpips Chop. Currently it is known as Victas Spinpips D3. It is intended for defensive choppers.
For a while now I have been chopping with long pips, mostly Feint Long II, Feint Long III, and Curl P1v (considered the spinniest long pips). Spinpips D3 is far spinnier than any of these.
Normally long pips have weakness in returning dead balls -- because they cannot create much spin on their own, and so the returned ball will also be dead. Spinpips D3 does not have much weakness in handling dead balls because you can either hit them hard as an attacking shot, or you can chop and create your own spin.
Chops in general had a lot more spin on them. My usual training partners (who are used to my chops with long pips) dumped a lot of my balls into the net. However, the downside of this rubber is that it's much harder to control -- a high quality topspin is very difficult to return onto the table.
Aside from the tradeoff between spin and control, one thing I liked about this rubber is that I could attack with it. Normally I will need to twiddle to the inverted side to attack, but not with Spinpips D3.
The grip of this rubber does allow you to manipulate the spin of the ball much more than you do with long pips, and it can be fun to produce some strange sidespin chops. Again, this comes at the cost of more difficulty in returning high quality shots.
Better for chopping than any other short pip I've tried. Used by a lot of professional short pip choppers like Hou Yingchao and Li Tianyang.
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