I needed this product because i get agitated when i have to think while sitting still. Standing while working has proven better for managing stress. Overall this is product serves its intended function well.Adjusting height is SO easy with the lever. And i dont have to rely on a battery or electricity.I never use it at full height, as I'm only 5'6", but since it satisfies me at half its height capacity, it probably has the range for tall people.I didn't install the keyboard tray, as it would've blocked access to desk drawer in the sitting position. I havent found this to be a problem because (1) there's just enough space on the main platform to fit my monitor and big keyboard, and (2) my monitor has an adjustable neck, which allows a comfortable screen height despite the platform being at arm level (for ergonomic keyboard use). For people who will need to use the keyboard tray , they'll want to make sure that losing a few inches of clearance below their desk surface in the sitting position isn't an issue to accessing drawers, etc.The other thing I would advise is to add nonslip padding below it if the surface your desk is very smooth. Mine has a shellacked top that offers no friction, and i find this whole thing has inched back over time.Overall, this product has made a huge difference in my workflow. Highly recommend for someone needing standing options for a small deskspace!