Go to youtube and watch the "what's in the case?" videos with Samm Diep. A lot of the top guys use LD shafts, but a lot of them don't (Reyes/Souquet/Strickland/Morris to name a few. I feel slightly more accurate with a LD shaft on long shots but I feel like I have to work harder to move the cue ball. Had a predator z and a 314 for a year and didn't like them. My Pechauer shaft is my favorite. LD isn't better, just different. If you are comfortable compensating for deflection/swerve/throw with your current shaft, you should be able to adjust to anything (of decent quality) and see the pros and cons to all cue designs. Predator and OB make top quality products, but they're not for everyone. A lot of guys now are hopping on Fast Larry's juiced shafts, which are 11.5mm and pretty whippy (in a good way!). LD shafts make me feel more robotic if that makes any sense.