Product review (4 stars): Tricky to use, a little finicky, looks great
ORIGINAL:  When the burners on top work right, they are great.  The front left gets a little funky and we had to have ours replaced.  But that would just merit a star off.

The problem is the oven.  It's a convection oven, so it should be much more even heating that a regular gas oven.  Unfortunately, it is not.  Temperature in the oven can vary by more than 100 degree from one area to the next.  So forget about baking anything precisely.  We have resorted to rotating items both between racks and facing multiple directions, during any baking.  Very disappointing.

UPDATE:  We were using the convection setting incorrectly.  Even though it sounded like the convection fan was on, if the light inside the oven is OFF, then the convection fan is not actually working.  You have to turn the knob for the light to the RIGHT, and the second fan, (not the one you hear at first) goes on and the light stays on the whole time.  This means:  If the light is off, the convection feature is NOT enabled and you will get uneven heating.  Note that it is possible to turn the light on without the convection feature too, so just because the light is on, does not mean the convection feature is working.  But the opposite is true.  If you think you are using the convection feature and there is no light on inside the oven, you are wrong.  We were wrong :)

ORIGINAL: The one (other?) odd feature of the fan/oven is that this thing blows out lots of hot air into the room while the oven is on -- I mean, standing in front of it is like standing in front of a heater vent sending out heat on a cold day.  It makes summer baking out of the question.

But it does look very good, sitting in the kitchen and people oogle it.  I just tell them, if you get one, get one with an electric oven.  I'd hope (but don't know) that it works better.  Honestly, the $200 generic gas oven we had in our college apt was better for baking than this one :(

UPDATE:  After a few months, got some better info from Bertazonni's representative.  There are a separate set of instructions they use in training their folks about how to use the oven -- things not covered in the user manual -- in terms of adjusting temperature for use with the convection settings, etc.  These have helped us get some better performance in the oven for baking.  I'm still testing all of them out, but so far it is working better, so I have added a couple of stars.

I am still leaving off one star because of the faulty burner I got at first and the strange convection light.  But the warranty replacement burner has worked fine, so that's good customer service.  And having to keep the light on is weird and counter intuitive and probably a bit wasteful -- but at least the convection feature works!