Honestly one of the best training aids that I've ever used is the smart ball. I've used this for about 9 months now and every time my swing feels off, it shows me where/why. I have always been of the mindset to smash the ball and watch it fly. A true grip it and rip it. In doing that, my swing has become really long to get that power. That has been causing a lot of inconsistency. The smart ball is showing me how long my swing needs to be and that I can still be connected. It's taken a while to try and break a 5 year habit (how long I've been playing), but I truly feel like it's working! Plus look at how many tour pros are starting to use it now too.