Product review (5 stars): Easy to install
They fit. They work. They solve the problem of old, worn 'shocks'. Easy to install. An easy diy.

I would pump them a few times manually before install. Distribute the oil evenly on the shaft, etc. Fully extend, fully compress.

Note these aren't really 'shocks' like in a car. There is no hydraulic oil. No piston. No internal guts. Its just a shaft that slides in and out with some pretuned level of friction. There isn't a seal, more like an oiled wick sort of washer, soaked in oil that keeps the shaft lubed.

So its easy to see how they wear out. They slide up and down enough, they wear out the plastic that is providing the friction, then they slide in and out too easily. So if your machine is old, these are probably worn enough that new ones will make it work smoother.