I had a chance to demo the mid and mid+. I found the mid to be too heavy for me. It weighed in at 12.3 oz and I would need more time to really know if it was for me. It was very solid, however, but felt a little stiff. The strings were quite tight, though, so that may have had something to do with the harshness. The mid+, on the other hand, was sweet. I've never played better. It's light (~11.3) and flexible with a big sweetspot. The string pattern is slightly more open than the mid because of the 100si face and that helped my serve. I had great control, big serves, solid groundies, and a wonderful volley. I beat my 4.5 opponent 6-2, 6-0. It was that good. My order is in!