I only have about 30 games on my TNV but the reaction had gotten better not worse so far. The only concern I have is its already showing signs of a beat up track. I did use it for a 6 game set this weekend on some fairly burnt wood lanes though, but it did take more of a beating than any of my other equipment. However, its nothing a sanding and repolish wont reverse though.
The problem im seeing with newer coverstocks like on the TNV and my Black Widow, is that they need a lot more maintenance. Ive used my Smokin Inferno and Absolute for 2 yrs and they have held up with good cleaning habbits, a soak a couple times a season and a once a year resurface. So even with a great reaction a ball i have to resurface or extract the oil from every 50 games is going to be hard to hold onto for me.
Im hoping the polish on the TNV will keep the ball from soaking up oil as fast as my dull Widow, so it keeps its reaction between soaks longer. I also hope that because its rare I bowl on wood that its holds up better on synthetics.
But only time will tell, for now im enjoying the ball and shooting great scores with it. I dont expect balls to last forever, but would be nice to get least one season out of them
JD