First, allow me to say that we are really experienced cooks in our household. We got the 30" Bosch 800 Series, because of Bosch's reputation and the warming drawer.   We are very disappointed.  The range has a design problem, either the burners are too low, or the grates are too high, so there is too much space between the fire and your pot or pan. It takes FOREVER even to boil water.  You will never get a good sizzle with this range, and you have to be REALLY PATIENT to brown chicken or meat. When it does, the meat is often already dry because it took so long to brown.  The only "good burners" are the center one and the one to the right.  The two small burners at the back are almost useless.
Also, bad quality control.  One knob is at a lower level than the rest, and the warming drawer does not close evenly, it protrudes on one side (I have already tripped twice with it). Hope you learn from our mistake.