I have never used the 25R, but that's only because the VTC5A had already been being king of the hill for about half a year or so by the time I picked up vaping. I switched to the Vapcell rewrap of the VTC5D not too long ago, as that one runs for a bit longer than the VTC5A despite they both hit pretty much equally hard at the amp load that I typically use them at, but I also got the 5-legged iJoy 20700 at the time when the first 20700 mech came out (the Vaperz Cloud XXX), in addition to the iJoy 26650 at the time when the Vapergate The 99 came out. I switched from the 5-legged iJoy 20700 to the Vapcell Gold 30A 3100mAh 20700 because it hits harder, at the same time when I switched from the VTC5A to the VTC5D (Vapcell Black 25A 2800mAh 18650), and, at the same time also, I started to use the Vapcell rewrap of the Samsung 30T (Vapcell Purple 35A 3100mAh 21700). Most recently I switched from the VTC5D to the Samsung 20S because it wipes the floor with both the VTC5A and the VTC5D. I don't know why some people are still jumping up and down about the 25R. Maybe it's because these people just hate serious battery performance upgrades?