I am very pleased with the seat jackers. I fitted them front and rear on the passengers seat in our Honda ZRV 2024 model which I believe is the HRV in the US.
The jackers were very easy to fit taking no more than 30 minutes. I did not need any assistance fitting the front first and rears thereafter. Note that I left all securing bolts loose until all were started. Once I was confident I would have no trouble getting the bolts started I then proceeded to tension them.
The seat was a powered seat with no height adjustment. My thoughts on the height of the seat are the same as what others have commented i.e to low and very difficult to get comfortable after 1 hour. Also poor visibility for my wife.
The jackers have improved the overall comfort significantly and I am very pleased with the purchase.
I originally went with seat jackers, my 5' 2" wife loved them, myself at 6' had just a little clearance between my head and the sound bar. I later switched to the 1.5" seat slammers and we are both very pleased with the results.