I used Ikea cabinetry for the cabinet "carcass" and ordered custom doors to give the kitchen a custom-made look. (Ikea drawer and door hardware is excellent -- made by a German company called Blum -- but Ikea doors make an Ikea kitchen look like... an Ikea kitchen. And Ikea will sell you their cabinets without the doors and drawer fronts.)
Alllstyle were outstanding. I ordered doors and drawer fronts in natural cherry for the lower cabinets -- an unusual choice, but they had no problem fulfilling it, as they have a wide selection of woods, including walnut, oak, maple and others. I had them build the upper cabinet doors in paint grade MDF. Allstyle took care of delivering the doors to a finisher to apply a satin lacquer finish on the cherry and a soft white satin sheen on the paint grade; then picked them up and delivered them to me. Altogether, there were nearly forty doors and drawer fronts, and each was made exactly to measurements I specified to the 16th of an inch. I'm delighted with the results.
Allstyle know all about Ikea doors and all I had to specify on the order was "drill for Ikea hinges" and doors all came back ready to fit the Ikea hinge hardware perfectly. Infinitely better looking solid cherry and cherry veneer Shaker doors drawer fronts that weren't all that much more expensive than ordering the highest end doors and drawers from Ikea. And I saved about $15,000 over the cost of a fully custom kitchen.
I would highly recommend Allstyle if you don't want to pay for a custom kitchen, are considering an Ikea kitchen, but have the budget for something a bit more upscale.