I realize I did not put a lot of pictures of the treadmill itself :

-Here is the treadmill mode

-Here is the standing desk mode,

I just put the treadmill away and attach it to the desk with a snap hook. It is relatively safe but if you have kids or pets you'd better not let them in the room when you're not around.

-Here is the normal desk mode

Just lower the desk and take a chair

It was quite important for me to keep a single desk. If you are just using a laptop it's, ok to a treadmill desk plus a regular desk but in my case I didn't want to move all my stuff around each time, plus I didn't have a lot of room for another desk.