the certification program is designed to ensure that the Dw gets installed properly which eliminates a lot of call to Miele.

However it's possible that the installer you get never went through the training, or ignores what he was supposed to do. A lot of times the owner of the co. went to the training so XYZ Installs is "certified" but the guy that comes to your house has never heard of Miele and is at the mercy of his boss's ability to impart the info he gleaned at the training session.

That said, certified co's ore generally better than non.

Installing one is not rocket science and ALL the directions are in the owner's manual. The high points are: supply shutoff is atypical, the units are 60 cm - not 24" like everything else, don't overtighten the panel bolts or the leg leveler screws.

Thanks antss...I think we will probably end up just paying the extra to get a certified Miele installer so we know it will work correctly right away. I have also read on here the extended warranties aren't really necessary as the product is so good-hopefully that is the case.