I've got a bunch of CD buildings. I used the three Stalingrad Ruins sets and adapted them for my Stalingrad diorama, along with VP's Normandy Farm Ruin (you can see the results in the Articles section on Track Link).
The German Village Ruin is a nice set that I reconfigured for my Aachen dio, and I sandwiched CD's Dress Shop between VP's City House Corner I and II. I also used VP's old Church Ruin (I combined two of these sets). Also for that dio I built, but did not use, CD's Commercial Ruins and Berlin Street Corner (don't let the locale designation keep you from using this elsewhere).
I like CD's Urban series, which allows you to make two full stories and a ruined third story, or one story with a ruined second story --- or two intact stories. This comes in handy if you want to create a scene that doesn't involve a lot of demolished buildings.
CD's German Stronghold is similar to VP's Tobruk Pit and Machine Gun Bunker, with the very undersized door. Perhaps that was standard in real bunkers, I don't know. As I mentioned, VP's Ardennes Chapel, as well as their Town Hall, also have short door frames. I bought but returned their MASH tent, it was laughable how underscale that was.
From VP, I like their Ruined Rathaus, Ruined German Trade House, German Village Ruin and German Old City Building. You can also use these buildings in just about any Northeast European country, not just Germany. I reworked their Ruined Mansion for my Aachen dio so that it's almost unrecognizable. I also have their Ruined Barn and Ardennes Farm, which are nice.
Some of these buildings can be puzzles once you examine the exterior architecture and try to match up an appropriate interior for it. For example, the way windows are placed in the Normandy Farm Ruin or VP's Garage/Workshop Ruin almost necessitate a half-floor between the main and second floors. If you don't detail the interiors that's not much of a problem, but if you do, you have to think about whether a stairway might be positioned there to account for the positioning of those particular windows.
VP's City House Corner sets (as well as their City House Front) include nice resin window frames. They require some cleanup, and the plaster window openings are not always squared so some filler is necessary, and they are rather simplistic (they don't account for how windows would open or close), but they really alleviate a lot of work building the framing. But again, if you detail the interior you'll need to add the trim molding and sill. My Aachen dio is viewable from all four sides, so I spent a lot of time measuring and cutting Evergreen strips to trim out several dozen windows.
For my next project I'm going to try to recreate some actual buildings. I've picked up some Balsa-Foam (made by Jiffy Foam, search for them on the web), with is a dense, rigid styrofoam that you can cut and carve. I've got a pack of two 6"x9"x.5" sheets I think it might be quite suitable to attempt carving brick walls. If it's satisfactory, the buildings for the next dio will be completely homemade.
Hope that helps,