Product review (3 stars): Some serious problems
I have been using this oven for several months.  I'm a serious amateur baker and I use it quite often for baking breads and pastries.  It has its strong points. It is quiet, holds its heat well and bakes evenly, especially in Convection mode. It seems well built and the controls are not overly complex.  The hidden lower element makes cleaning the floor of the oven a snap.  But it does suffer from some serious problems--design flaws--in my opinion.  A relatively minor complaint is that when broiling, the oven cuts off power to the elements whenever the door is opened.  I often use the broiler for browning the tops of casseroles, pastries etc. and I like to be able to observe the browning process directly, not through the oven glass.  But as soon as the door is opened, the power to the elements is cut and they cool down.  It's an unnecessary, CYA sort of safey feature.

My major complaint though is with the temperature regulating system on this oven.  Most reasonable people would assume that when you set the oven to a given temperature, and when the oven beeps, indicating that it has preheated to the set temperature, it has in fact reached that temperature.  With this oven that assumption would be a serious mistake.  For example, if the oven is set to 350 F., its actual internal temperature at the end of the preheat period, as measured with an accurate oven thermometer, is actually only 280 to 300 F.  It may take as long as 20 minutes or longer for the oven to reach the actual temperature to which it has been set.  Now, if you're making a pot roast, this may not be a problem.  But if you are baking bread and both temperature and baking times must be very precise, this is a disaster.  Even though the owners manual clearly states that once preheating is complete--i.e. when the oven beeps and displays 5 bars--it has reached the "set temperature", it in fact hasn't even come close to the set temperature.

To its credit, once the oven does reach the set temperature, it holds that temperature very accurately and consistently.  But the only way to know what the true temperature is at any given time is to use an accurate oven thermometer and a flashlight to help you read it.  Unfortunately, Bosch does not supply these, even as accessories.  An oven that costs $1,500 should not require the use of auxiliary equipment, supplied by the user, in order to be useable.  After several fruitless conversations with Bosch technicians, I finally got one of them to admit that the oven is functioning exactly as designed (regardless of what the manual claims) and that there is nothing that can be done to change that.  I continue to use the oven, always making sure to give it an extra half-hour of preheat time and then checking the internal temperature manually, but I would not buy it again.

One other point.  This oven is not a true convection oven (nor does it claim to be.)  In other words, in Convection Mode it uses a fan to circulate the air within the oven, producing a more even heat.  But the fan is not coupled with a separate heating element as in a true convection oven.  That's not a problem for me because I'm more interested in even browning than in reduced cooking times.  But if you need true convection, this isn't the oven for you.