I have had 3 Infernos already since they came out, so I figure why not do a review on them. I am a high speed cranker, just for reference.
My first Inferno was drilled 5 1/2 x 4 1/2, a perfect pin over the bridge, mass bias strong flip. For me, this Inferno was STRONG. It got down the lane very well, started reving strong in the midlane, and unleashed a MAJOR flip on the backend. With this Inferno, I could open up a house shot the entire lane. However, this Inferno was conditional, as it could only be used on house shots with clean backends. The pin over gave the ball some squirt on carrydown, as well as too much length on sport patterns.
My second Inferno was drilled 4 x 5, with the pin directly next to the fingers and the CG just above the thumb, placing the mass bias on the left side of my grip. This Inferno for me was very ROLL-y. It was the weakest in terms of backend and overall hook of the 3 Infernos, but it was the most versatile. This ball was usable on any oil pattern as long as there was some head oil. The ball got into enough of a roll to work on some carrydown (though I had to play straighter with it) and it was the best Inferno for sport patterns, as it had the smoothest, most controllable backend.
My third Inferno was drilled 4 1/2 x 3 1/2, with the pin above the middle finger, the CG outside and right of the grip, and the mass bias strong in the roll position. This Inferno was the strongest for me. The length was slightly more than the second Inferno, but the midlane and backend were sharper and stronger. This Inferno, for me, is still my heavy oil ball. It needs plenty of oil to be usable, as it will flip HARD off of any dry it sniffs.
Just a side note: The Inferno is the HARDEST HITTING ball I have ever thrown.
Overall, the Inferno is probably the best overall ball on the market today, in my opinion. Its drill adaptability is amazing, as it seems to perfectly take the shape of what you drill it to do. Want it to smoothly arc, drill it to smoothly arc. Want skid/snap, drill it that way. Want huge hook potential, drill it as strong as possible. I could even see a weakly drilled Inferno being usable on dry lanes. In closing, I have to say that the Inferno is unbelievable, and if you don't have one, you are missing out.