This mattress pad is amazing.  Just the fit alone makes it a 5 star.  There is no excess material to bunch up.  What a smooth fit around my king size bed.  To add bonuses to this, the cord to attach the heating elements are nicely hidden and do not bunch up like other heated blankets or pads are.  I like the option to have a second one either attached or not.  I sleep alone so I only need one side to heat up.  The controls are easy to navigate.  It heats up very nicely too.  Very much recommend this product!!