[exercise] What do you folks think of this?

Those types of exercises seem pretty worthwhile to me, but I'm not sure about this machine. The lack of support or weight grounding it makes me nervous about trying it.

yeah I worry it'd fall over backward

since I can manage to do that on a ladder with a similar incline

Or sideways! It seems like a lot of force would be put on the bottom front of the machine while using it. The base does not seem sturdy enough to handle the downward or sideways rocking motions a person might do throughout a pretty difficult exercise

True, very true.