We moved Tyler to 2 naps at 6 mo, and yes, it did fix his 30 min naps...BUT we were totally sure he was ready before we did it. He started skipping his 3rd catnap every now and then and was difficult to put down for naps and bedtime. I think those are your best indicators of whether or not your DS is ready! If he is, be prepared for some rough days, early bedtimes, or still offering the evening catnap! Good luck!