Review (3/5): You get what you paid for!
The cost is cheaper than most other replacements as they are not Official Norelco Brand. So, remember why they are cheaper. My experiences with these HQ8 replacement heads/blades:
The center caps popped off the heads as they came out of the package, I successfully super glued them back on. I tried this replacement HQ8 set on an older XL and then moved them to a brand new Turbo Norelco. And on both shavers, they randomly pinch or pull your facial hair really hard. I kept my old blades from the XL and obviously the new shaver has good blades and heads. The issue with the replacement set here is the dual precision heads. THE FIX: I took the original Norelco brand Lift and Cut heads and put the new HQ8 rotary blades inside the old lift and cut heads and it works great. You can see a difference in the design of the heads. The picture on the right are my old lift and cut heads with the new HQ8 blades installed inside them from this HQ8 package. The head design on the left has an issue with pulling hair and pinching. I would recommend this modification if you experience that nasty pinching and ripping facial hair out with this HQ8 replacement set from Amazon.