Some people think they are not as good as MDs because it is slightly easier to get into some DO programs. But I have a pdoc who is an expert with complicated cases and a family dr who works so hard with me to balance my bipolar meds that have a lot of restrictions, my numerous allergies to meds and several conditions that need to be handled to keep me healthy. Once I needed a specialist and after the first one refused to see me he not only called and talked to the 2nd one for a long time he also sent a 3 page comprehensive letter about my situation to the other doctor. He's amazing and has learned about psych issues over many years as my doctor; he was brand new out of residency when we met.

Like I said, given a choice I go DO. It's not always possible though.