<div dir="ltr">Does anyone have any opinions about the MarvelMind Indoor Navigation system? <div><br></div><div><a href="https://www.superdroidrobots.com/shop/item.aspx/ips-indoor-navigation-positioning-system-dsp-starter-set-nia-v5-07/2664/">https://www.superdroidrobots.com/shop/item.aspx/ips-indoor-navigation-positioning-system-dsp-starter-set-nia-v5-07/2664/</a></div></div>