Just wanted to add a couple of notes here based on some questions you all are asking:
- I didn't find any problems with control, although it did take some "getting used to".
- I would estimate the swing weight ot be in the 320's.
- the racquets spin comes from the 16X15 string pattern.
Lastly, I spoke with one of the engineers and asked if they tested durability of string compared to 16X19 or 18X20 string patterns. I was informed durability was a bit less, although I would guess depending on the string and tension, this could potentially be a problem if you don't use poly.