2" is better than no lift, that's for sure. But these lift's do not actually increase the maximum angle that the axle travels, they only offset the starting point of the travel. So, the axles will not ever see any more severe of an angle than they would have stock, but they will be in the upper end of the axle angle range more frequently than stock. I have not had any issues with axles, only boots, and that is from mud and rocks getting packed in there when going through ridiculous mud holes lol. For what it's worth, I drive with my foot to floor more often then not, through some pretty gnarly stuff, and jump steep 15 ft embankments that cause me to land solely on the rear to wheels before the front comes down, and I still have not busted an axle. I honestly would have no concern about the lift kit and axle life.