Played a competitive set with it today. It was amazing! My hitting partner really liked it too - he named it: "Thor's Hammer".
Thor's Hammer is pretty spectacularly solid on returns, and really grabs the ball for spin. I can really hit a heavy ball, yet what sets it apart is the control - depth control, directional control, touch, spin control. everything.
Serves were the one thing I was concerned about before I tried it, but I really liked serving with it. It' really easy to consistently hit a super-high-rpm serve, so it dives into the box reliably. And since the rpm so high, I can make the kick bounce differently by varying the attack angle (either twist it to toward the backhand or curl it toward the forehand with similar motion). The height of the kick doesn't go as high because I wasn't cranking the velocity, but that's partly because I was using softer balls on a cool night, and the extra rpm makes the ball start to curve back downward after the bounce.
Volleys are solid as rock - just stick it out there. And defensive shots seem easier to control. I think I found my new favorite swingweight. I think having so much extra twistweight really amps up the spin while making the racquet more stable at the same time. I have 4 layers of lead tape at 10 and 2, and 3 layers at 3, 12, and 9.
Overheads take good footwork, but if you can get the racquet up early enough, it feels like a sledgehammer.
I felt like my groundies seem to have deceptive heaviness that caught my opponent by surprise so that he was hitting late. He's a regular partner too.
In the past, I had shied away from going heavier than 370SW because I noticed my serve losing pop (compared to 360 at this shortened length), but at 380SW, the loss in racquethead speed seems to be offset by some other advantages - more easy access to spin on the serve (which helps with consistency), and more stability and control on every other shot.