Very good ball control, the tennis fans from weekly double-Treff have immediately asked where you can buy these balls. My premiums were significantly better, the first set 6: 0.
What I noticed is:
The Head Radical appear to have a softer felt than other brands and that is clearly noticeable in slice and drop shots. Even with top-spin strokes played the ball bounces pretty high after impact.
The ball fits comfortably in your hand, the surface is less rough.
Price-performance ratio, ready for immediate use due to fast delivery.
Doses were "fresh" supplied that you could clearly feel when opening. There was really pushing it ...
I'm very satisfied, can recommend.