Hi Alisa,
This inventor lives nearby.  I purchased the Up-N-Go for my mother when she broke her hip and now he has a new invention that I like better.
click
http://www.easy-walking.com/up-n-free/
I went to his house and tried it out.  It is really unique. 
Carol
 
_________________________________
Carol Kann, Ed.D., ATP
Assistive Technology Professional
xxxxxx@xxxxxxxxx

 
 
 
Alisa Brownlee, ATP
Clinical Manager, Assistive Technology Services
ALS (Lou Gehrig's Disease) Association National Office
 and Greater Philadelphia Chapter
Direct Phone: 215-631-1877