After using this for a few weeks I can say that this definitely makes riding more comfortable.
I have a hard tail mountain bike that I use for trail riding and this helps to smooth out the bumps.
It is very well made, a very solid build. I’m 6’1″ and 220 pounds and it gives me a nice cushion.
It was easy to install but you will have to drop your seat because it does raise it up a little. 
More customer reviews on Amazon …
I wanted some sort of suspension on my ebike seat, and I’ve tried others that were less expensive, and you can feel how cheap they are in the ride.
I ditched those and tried this thing, and I’m loving it.
At first, I was like, This isn’t doing anything, and then I’d hit some bumps and think I didn’t feel much.
Maybe this isn’t doing anything?
Then I carefully reached my hand under the seat to feel what it was doing, and to my surprise, it was doing a lot.
I think the fact that I wasn’t really feeling what it was doing was a testament to how good this is.
All I can say is that this thing is staying on my bike from now on.
The more I ride, the more I realize how much more comfortable my rides are now.
This probably goes without mentioning, and be aware that this adds height to your seat, so if you’re normally riding with the seat post all the way down, it may make your seat too high for you.
I recently got a gimbal for my phone, so I’m going to try and post a video of the Air Seat working while I’m riding.
Stay tuned… 
More customer reviews on Amazon …
My seat is comfortable, but doesn’t have cushion or spring…it does now.
I am used to seats with vertical spring action, which this device adds.
There is also a slight lateral movement that takes some getting used to, but I kind of like it and got accustomed to it quickly.
Performed well on a five mile test run over smooth and rough pavement.
It is very important that you have 1.5 to 2 inches of adjustment travel left on your seat post (I did), since this device will use that up. Otherwise, you will be riding higher. Took about 15 minutes to install on a Trek mountain bike.
Consult the position and weight chart to select the right model.
More customer reviews on Amazon …
I bought this for my wife’s Aventon Level2.
We ride gravel National Forest Roads and rail trails.
Being short, she couldn’t fit a suspension seat post on her bike.
This was an economical and practical solution! She loves it ‼️ ‘Nuff Said!.
Tested on a paved trail. Only 4 stars till we see how it holds up on gravel. 
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The original Brompton C Line nipple tube can be used, and I rode for 70 km without wearing cycling shorts.
The only discomfort was from sitting on the saddle for a long time, with no other discomfort or pain.
I highly recommend it to everyone!
The old 4130 frames really smoothed out all the city road noise and bumps.
This innovation restores the comfort long gone in the modern aluminum framed bike supply +.
The old saddle spring I had compromised fit and failed in fatigue as expected.
Thankfully this was at my door in 2 days and makes a sweet ride out of my Specialized Roll.
Went out and hit manhole covers 50mm proud of the road with a sharp edge.
I avoid them when possible but this test gave my lower back zero issues.
Don’t hesitate pick one based on your ride position and weight and do not look back.
All the way home I hit the biggest expansion joints and cracks I could find and nothing…
Yes I like it!
Better design and fatigue tested. -Update 40 miles in I am very happy with the extra comfort delivered.
I will now stop testing and intentionally hitting the craters when possible but remain confident when traffic or other issues demand I ride through it!
Best $$ spend on my bike adventures yet.
