To fill you in quickly.. my driver swing speed is about 103mph. When playing a ProV1 or Callaway HX Tour my average drive is about 260.
I played my first round with the Precepts this morning, but only used them on the front 9. I hit 5 drives in the fairway on the front. My longest was 254. The shortest was 242 (all measured with my GPS). The 242 was an outlyer.. all the others were between 250 & 254 (flat course, not much variance).
On the back side I switched to Callaway HX Tour 56. I hit 6 drives in the fairway, and the shortest was 256. All the others were above 260, with the longest being 267.
The Laddie X doesn't spin worth a crap. I was hitting some nice wedges in to the greens from about 100 and the ball would still bounce 10ft or more.
On the back, hitting those same shots with the HX Tour 56, the ball would stick.
On my mid irons, the Precept was roughly the same distance as the HX Tour 56, but didn't have much feel to it. The HX Tour 56 is noticeably softer.
As far as straightness, I couldn't tell any difference in the Laddie X, a ProV1, or a HX Tour 56. If you hit the ball with a hook or slice swing, it's going to hook or slice. No ball is going to cure that.
Bottom line.. I think you get what you pay for. I think ProV1's and other $45 balls are overpriced, but didn't expect much from the Laddie X's for their price. I don't feel like they're really good for people with higher swing speeds (specifically I mean faster than mine.. I don't consider myself to have a high swing speed) or people who have good short games and can control the spin on their shots etc. I don't think many low handicappers (lower than mine) would like this ball.
Hope this helps someone out...