I demoed this and three other rackets with my father and he liked this one the best. He's relatively new to playing, and he likes the comfortable weight, sweet spot, and flexibility of the racket. It gives him just the right balance of control and power. We liked that there was a trap door at the buttcap of the racket. It was very easy to add weight to the handle. Overall, this is a great racket that leaves ample room for customization. It's versatility makes it easy to recommend it to players of all skill levels.
I really like this racquet. I has more pop than the microgel version i have been using. I am a 3.0 player that has had pretty major shoulder repairs including full rotator cuff tear. I have this racquet strung at 55 lbs with Gosen comfort 17 string. I like the response, control and power without the shoulder strain i experienced with other racquet and sting combo's i have tried.
Flexible, E-Z on the arm & shoulder, big sweet spot, you can dial-in power vs control with different strings. It's a little crisper than the Microgel version.
I am a 4.0 player with a full swing. I am very familiar with the past versions of the Head Radical OS. I found this one to be even better. The racquet feels crisp and provides plenty of power from the baseline and on serve.