OK. So, I bought the I1 and put Zyre 03 at 2.7mm on both sides. Played with it today for the first time. Here's my impressions after one day of playing and doing drills. Keep in mind that I'm comparing this to my old setup which was the Carbonado 190 with Tenergy 05 and 64. Both blades have Limba outer ply and Textreme fiber, but the I1 adds Innegra to the Textreme. Was expecting not too much difference, but there was. I think the I1 is ever so slightly thinner which makes the stiffer Carbonado feel less flexible and not as capable for topspin. The Carbonado feels solid and is good for smash and hard counters and blocking at the table. First off, the I1 racket feels a little lighter in weight. The I1 supposedly weighs 85 grams and the Carbonado 90. But the Zyre sponge is thicker, so I didn't know what to expect. It feels light and nimble. Then I bounced the ball and the sound was a higher frequency. The rebound felt crisp. The Carbonado feels dull in comparison. The handle feels a little smaller than the Carbonado which seems a little thicker. Wasn't sure I liked that at first, but when playing, I found that I was using my fingers more to grip the blade and relying less on the palm of my hand. Smaller handles allow for easier adjustments to the grip for forehand and backhand, so I was ok with this. This may be due to variations in specific blades, I don't know. The ball came off the racket fast but direct and controllable. The biggest difference I noticed was in my forehand loop. When I fully engaged my swing, it felt like there was a little flex to the blade and it complimented the rubber nicely. I had more confidence in my loop and it seemed like I could loop everything onto the table. Backhand was good, but not as dramatic as the forehand. Probably because the swing is bigger on the forehand. Some people say that Stiga blades seem hollow and I can see that. I don't find that a problem and suspect that it may due the way they flex. Overall, I see this a huge step up from my old setup. Since I changed both blade and rubber, it is hard to say how much is due to the blade and how much the rubber. But when fully engaged, this does seem like a pretty fast and controllable blade. The Carbonado is a fast but stiff blade. This one just feels more dynamic.