I went through a pedal phase where I was trying a number of different things. For awhile I was using those on a winter bike and a pair of Quattro's (discontinued Crank Bros road pedal) on my road bike. I liked the low profile cleats that would barely click at all when walking but was not quite content with the clipping action. I ended up selling them both.
So "yes" to both questions. I found them useful but eventually sold them.