Very very happy with my ABS Tour Ultras.
I find the quality to be much higher as my SST5's and my 6's all fell apart after about a year.
With my Dexters I had to use the heals and soles that slid the most, or I wouldn't slide. With my ABS shoes I can change to different soles and still be able to bowl. It's like I can use a sole that's in the middle and slide, just not as much, like I think it should be. With my Dexters I could never change to adjust to approach conditions, with my ABS ones I can.
The comfort is much better as I always felt like I could slip out of my Dexters. On my ABS I am more secure.
I never want to go back to Dexters.