I LOVE IT!! I am a loyal customer of almost 20 years. ONLY SHARK products in my house. However, they do not see to last like they use to. I have a few suggestions:

In General
1. Improve the quality of your attachments, they are not made very well.
2. Expand warrantee on motorized floor attachments
3. Make the cordless suction as good as a cored vacuum.
4. Make battery that last longer 

  Vertex suggestions
1. Put the kick out back legs on it, like the Apex LZ600
2. Make it sense the floor type so you do not have to manually change it, like the LZ600.
3. Move the power button and make it a switch 
4. Remove the power and floor selection buttons.