I tried it back in 1999...ten years ago and never looked back. Once I started seeing people using this and 75% of the PBA was using it I tried it and I couldn't get used to it at first but after awhile I loved it.
Once you get a ball drilled finger tip drilled correctly, you won't look back. Every ball will feel the same and will prevent you from squeezing having a cleaner release potentially. Also, the cost savings saves itself. If you keep a ball for a few years and bowl a lot your going to have to replace the grips. Also, the cost of not buying grips on your new ball saves you money. Plus, you don't have to worry about cracking around the fingers and bridge which grips are notorious for. I ask people why they still use grips as they ask why I don't. After I tell me reasons and sell them on mine, they may try it.
Also, if you try it on a ball you can usually go back to getting the holes enlarged for grips if you really don't like it. It really takes awhile to get used to but really love it and will never use grips again. I only used them in the first place because pro shops recommended it.