In a nutshell:
Not slow, powerful, very spinny but hit sharply with speed, can be used as any other rubber by non chopers. All round play is perfect
In detail:
I got black 2.0 on my FZD Alc replacing my 3 month old tenergy which slowed a lot and lost a lot of grip. I've also played H3 National blue sponge boosted with two layers of falco long. So I can draw comparisons to these two popular rubbers to give a good idea
Speed on active shots:
3rd ball blistering fast and spinny when power looping against Push. Same speed as tenergy but with less arc safety, as grippy as a new tenergy but much better than 3 month old tenergy. The ball will always grip and I never hit the net even though the arc isn't very high.. all in all monster 3rd ball rubber that can finish the point there and then , slightly slower than full power h3 national but that's irrelevant as speed you get is already enough to win the point and at least on par with tenergy speed for this shot.
On serve: speed is lower than tenergy 05 which did not allow me the occasional blistering fast long curving long side spin serve to the corners... I miss that so for me it's a worse serving rubber than tenergy, but as good as H3 National because short spinny servers are indeed great. Tenergy can vary long and fat and short spinny better so for me tenergy serves better although it's much more challenging to keep it short with T05.
Drive: speed is there, a lot faster than H3, slower than tenergy, maybe same as Fastarc G1 but with a tiny bit more effort. Spinon drive tenergy wins because it even spins flat hits and gives arc... H3 doesn't at all.this rubber arcs a bit more than H3 on drive, but won't really give spin of you hit flat and clearance over the net isn't very high so it's always better to add at least 20% spin by tilting the racket angle... Spin gives safety and speed - I'm this way similar to h3 More than tenergy... But it's much faster than H3 on drive... Doesn't feel dead.... And once I gave that little bit of spin drives are low fast and dangerous.
5th ball and rallies
Here the rubber kind of reminded me of rakza 7 , spinny controlled, fast enough but not super deadly... H3 in top hands would be most deadly. T05 in good hands would be controlled and dangerous.. this rubber is probably a bit more controlled but has less arc safety here too, and you have to hot a bit harder than with tenergy to keep the attack dangerous... But then again not as much as with h3 where you need to be swinging at 90%+ force each shot and in position... With Victas 401 you can be a little off balance, a little bit late and still land good shots, once again better than H3 the worse balls didn't go to the net... So ok you're still in the point even if the opponents block surprised you or pressured you....but here comes something special.....
On 5th ball you don't really HAVE to loop with this rubber as you do with h3 or tenergy!!! I had many points where I made a string 3rd ball my opponent moved back and blocked powerfully, so I just made a drop shot or even a short push!! Maybe that's why it's a chopping rubber! You can switch from loops to push,drop shot, pushes very easily... It reminds me of sriver El which was the only rubber I could do this with....this means you can vary play much more, you're not forced to attack or loop.
Full on looping rally the rubber is worse than tenergy 05 but still manageable although I found myself instinctively using a more all round style to break such loop rallies.
On active blocks great fast direct controlled not spin sensitive, but not as fast as a T05 block.. much faster therefore much better than H3. On passive block it's a tiny bit too weak for me, but I don't passive block very often I always do something with my wrist or add force back
