Well, last night I cooked prime rib, roasted potatoes, carrots and parsnips in the combi. Earlier in the afternoon, I made a bread pudding, and my lunch was regenerated chicken from the night before. In other words, my combi is my go-to oven, and there isn't much that I don't cook in it. I don't have the Miele, but you would be surprised how much fits into a combi. I also love that it is smaller, so it heats up faster than my regular oven. Take a look over on the appliance forum, there are lots of discussions over there. Here are a couple to get you started:

https://www.gardenweb.com/discussions/4530439/miele-combi-steam-xxl-vs-xl-do-you-wish-for-bigger?n=39

https://www.gardenweb.com/discussions/2291555/miele-combi-steam-oven-owners-thread?n=266