I had one of those cast iron reversible grill/griddle plates that is placed over 2 rangetop burners and used it for several years.  I actually bought this because I wanted a waffle iron (mine died after 30 years), and saw this had waffle plates (sold separately).  I hadn't realized how much quicker it is to grill on this than on my old grill plate!  Admittedly, I've only used the "griddle" when using the waffle plates, works great!