I've never had a problem with mildew but I also tend to leave the door open for an unspecified amoutn of time once it's done. I'll close it later if I can be bothered but the open door doesn't get in my way so I don't really care.

I also tend to empty it within an hour after it's finished so I have no problem with mouldy clothes or linen. I hang out all of my washing and live in Australia, though, so that may be different since it's permanently a million degrees here and everything dries quite quickly.

I'm very happy with my front-loader. My only worry was that the cycle times were longer when I go 'oh shit, I need this clean and dry in an hour' but it has a 30 min quick wash anyway and then i can toss it in the dryer or hang it out in the sun if it's a hot day. It's served me well.

edit: I also wash all clothes on the 'cold' setting aka what's straight out of the tap. Linen I'll let do at the 40 or 60 or whatever it wants to do it at because it seems to produce marginally softer results but I don't really care either way and prefer to save the electricity on my clothes washes which make up the overwhelming majority of my use.