I've installed two 10X bushings and my results went like this.
The first went on a S2 upper that had came back from being milled. I didn't notice that the front sight was missing and the bushing went flying after about 20 rounds and I never found it. Once I had the 10X bushing installed the S2 seemed to be a little more accurate with a only a small tweak to DPP. The barrel was a little more difficult to remove, but manageable.
The second was on a 75B that always shot well, but had 15,000 to 20,000 rounds through it. Since I was changing the sights I figured that a new bushing was in order. I installed the new bushing and the groups were tightened up noticeably, but not dramatically. The sights didn't need to be adjusted very much. The barrel on this one is a little more difficult to remove, but I can live with that also.
Given to go through this again, I would without hesitation.