I have coil splits on my Les Paul Sig-T (new harness + Monty's Guitars' PAFs) and my PRS 594 (completely stock). It's a feature I use all the time on both of those. I mostly prefer playing in the middle position. I split the neck pup and dial the volume down to around 4 or 5. Keep the bridge pup in full humbucker, volume rolled back to between 8 and 9. Middle position is a nice rhythm tone, and I can just flip the pup selector down for lead tones, with the option of rolling up the bridge humbucker if needed. Works for me. I don't use the Sig-T for purely split tones. Not a fan of how that sounds. This weekend, I started exploring using the PRS 594 for purely split tones. Very early days with that. First impression was positive.