I really like this little laptop tray! 
I read the reviews on it before I bought it. I was a little skeptical but gave it a shot. 

When I used it for the first time I noticed that it didn’t stay latched and the legs would fall down, until I learned that tightening the knobs help to keep the legs in place. Since learning that it has been great!

It comes already put together. It’s easy to store as well! 
I am super pleased with this purchase.