I've never used on of the cheaper ones, but that is a common addition to the Fischer Dolly system and those work great. With a stable support you can do some cool moves like looking over a railing... I mean a dynamic shot of the rail coming towards the camera and the the shot tilts down to mimic a person looking over the rail down at something.
If the thing works well then it would be a fun thing to have on hand.
Footage is a MUST these days!
But will probably follow soon...
Could this be enough to get some movement in talking-head style interviews...?
Or is the way not long enough (of course in proportion to the distance of the interviewee...)?