I got this shoe at an awesome price.  Have been looking for a toner shoe, but never found one in my size that I could use for work.  Skechers don't make my size in women's, and men's are too wide.
As for the toning part-yes I am feeling the toning happening in my thighs, hamstrings and calves.  It is relatively comfortable shoe.
That being said, if you have tensor fasciitis, not sure if this is a good shoe.  Although while wearing it, it feels comfortable, I am feeling a little flare up with heels and feet.  I will continue wearing and decide if this will resolve after the learning curve.
Also another questionable use is if you have knee problems.  I have mild arthritis in my knees also, and it seems to flare that up.  Although the past couple of times wearing haven't been as bad.
I am wearing them only 2 to 3 days a week and am always taking another pair of shoes with me just in case.
If just looking for a work shoe for toning-this is a great shoe.
If you have health issues with feet and knees, check with your doctor if he/she thinks it would be okay for you.