It appears well made and the spring is responsive. The height in regards to how low and how high it can go is great. However, the chair wobbles. The rod in the base moves side to side. Feels unstable.

Rocking motion was disconcerting. Range of height adjustment was good. Easy to assemble.

This chair intentionally "wobbles" left and right, back and forth , etc for a little extra comfort/mobility. It was great for about 15 months. Now the rubber "donut" at the bottom of the post which allows this movement is completely disintegrated and the seat is DANGEROUS to sit on because you WILL fall over.

Don't buy if you expect this stool to last or if you weigh over 95 lbs. I weigh 190 lb. The 250 lb. weight limit is a joke!

I have a small space with a small writing desk that I use for my home office; there isn't room for an office chair, and the desk is too short for any other height-adjustable stool I've found. This stool is comfortable enough for me to sit all day, is the right height range for me (I'm 5'6"), and wobbles enough to let me move around without feeling unstable.

Was not expecting it to wobble so much. Air lift does not work properly. Maybe I didn't read the description well enough to understand that this is not a rigid stool, but more for leaning. I was able to MacGyver it with tinfoil around the base to make it serviceable, but this was not a great purchase.

Base is very unstable making it difficult to steady yourself.

It seems solidly made, was easy to assemble and works as described.

Personally (with emphasis) I found the tilt feature too wobbly so have replaced the base with a standard office chair base. It is not designed to hold your weigh just provide a perch. Nothing wrong with that.

I bought this for a multi-purpose chair. I use it in my recording studio, my office and as a throne for my drum kit.

Very sturdy and the adjustable height makes it very useful for various duties.

The built in ?wobble? takes a little getting use to, but it makes for a very ergonomic and comfortable experience.

I am most glad to have purchased this dynamic stool. I use it for work with my adjustable height work station. This stool is wonderfully comfortable. It's nice to be able to easily adjust the height by pressing on the ring under the seat. It's easy to set-up, and it comes with straightforward instructions. Highly recommend to others for work or as a stool for other casual sitting.

The quality is nice. I wish it were taller. I have to crank down my standing desk to almost a regular desk to get my hands below my elbows to type. Because of this I probably won’t use it very much.