CDA products are not the best around in either build or reliability. Google is good for turning up review sites.
Remember though that any appliance even Miele can develop a fault at any time, after all we are not perfect but we expect our appliances to be
that said if you look after your appliances they will look after you.
Bosch, Neff and Siemens are all from the same stable. Design, build, style are equal, functionality and add ons will vary as will budget as to which brand you purchase.
All three manufacturers cover all of the product ranges you are looking at. Bosch Neff Siemens
do have different exterior styles, so if you looking at a matching you are better to keep to one brand.