Product review (4 stars): I have one from 1996
I am writing this review one from 1996.  Everything still works although I replaced many parts related to all the ignitors including the one for the infrared oven.  Also some little gadgets in the control knobs to prevent ignitors from firing in error.  Karl Schaedel Co in PA helps you diagnose the problems and sells the repair part.  If I had to pay for repairs I would have thrown the whole thing out years ago.  I like the high BTU top burners and particularly the infrared oven that acts like the barbecue grill.  The infrared broiler has lasted nearly 20 years now and makes it possible to grill meat and fish during  the winter without going outside, although sometimes the flames inside the over get too exciting.  The weakness from the beginning has been the while enamel shell that I have sanded and repainted repeatedly and has I now gotten to the point of having to look for a new 30 inch wide gas range.  The Wolf infrared broiler's configuration seems to have mainly "dead spots" so I will  have to go with Viking again for the infrared broiler.  Apparently the new broilers can cycle on and off because of more conservative thermostat control but if you leave the door a little open, it will keep it cool enough to keep the broiler on.  Of course "stainless steel" can also rust depending upon the quality."