I have been researching sit stand desks for more than a year and still haven't made a decision. I am very picky!
What I learned is standing all the time is just as bad for you as sitting. So the idea is you have to keep moving. That's the main argument for sit stand desks.
https://www.lifehacker.com.au/2017/09/standing-too-much-at-work-is-seriously-bad-for-you/ I read an article a while back where they said you can look at the structure and tell if a desk is going to be wobbly at standing height or solid. If the lifting mechanism is thinner at the top than at the bottom that is a bad sign. The ones made by people who know what they are doing add extra metal bracing where the column joins the frame.
The latest trend in sit stand desks is to remove the bar mid way down the desk, this can also lead to instability if extra bracing is not added.
They also said the super cheap ones designed and made in China can be manufactured poorly. They said they aren't good with electrical tolerances in the motors or something like that, so they don't last long. I can't explain it properly as I am not an electrical engineer. There are only three linear actuator manufacturers that have been in the standing desk scene for a long time, so they are ones to look for. If I find the link that named them I will post it. Linak was one of them.
I think these are the guys that talk about that kind of thing a lot. They review standing desks and make their own called iMovR. so it could be all just a sales pitch. But read around there to get some ideas on what to look for,.
http://www.workwhilewalking.com/diy-standing-desk-choosing-the-right-basehttp://www.imovr.com/imovr-cascade-corner-standing-desk.htmlHere's what I know about some desk brands:
Ergotron look good but never go high enough or low enough for me. They are set up to use keyboard tray paradigm, but I want to have my forearms sit flat on the desk, like this picture. I also like body pockets which is a cut out made in the desk, that lets you rest your forearms on it.
https://activdesk.com.au/sit-stand-ergonomics/I looked at
IKEA but from what I read their desks don't last long and people were having trouble getting IKEA to fix them inside the warranty.
ConsetDual column:
https://www.conset.us/Product/default.aspx?m=prod&id=120I read a comment where the 501-25, 501-27 have trouble if you have an unbalanced desk, but if you have a single monitor setup they would be fine. The one that is solid as a rock and can take 150 kg is the 501-11. I saw a guy say it is design brilliance, but it is their top of the line model, far more than I want to spend and its too big for my home.
Single column:
https://www.conset.us/Product/default.aspx?m=prod&id=118I read a comment at Fully where they said the 501-7 wobbles at standing height. The 501-19 is the one I will probably get as it is single column and will leave enough room for my feet as I use a saddle chair.
JaswigThis is a wooden standing desk for around $300. No sitting down unless you get one of those ergonomic seats on a stick. They also make a little wooden stool for it, but their seat looks like it would cut off my circulation. I would have bought it if I used a laptop and it was designed to be used with a saddle chair.
http://www.jaswig.com/This video gives a good look at the structure and stability.
Then there are desk risers made of wood. If I could lean on them with my forearms and use my chair with them I might get one.
https://humbleworks.uk/compare-standing-desks/This is one I found recently. It is only for laptops, but it is a metal tripod you can fold up and take with you. I would have to assume it wobbles at standing height.
http://www.instand.com/cr5/cr5.shtml