Condenser, every single time. I've had both and a condenser is definitely better. You can put them anywhere as no vent hose, speaking of which, the hose is an eyesore, either hanging out the window or going into the wall. The hoses wear out/split over time and they get full of fluff from the bits that the lint trap doesn't get. Condensers do this too, but you just pull it out and wash it under shower/in the bath. toffee is completely right, get a condenser where the water tank is at the top as if they're at the bottom, it's a PITA to bend down to empty.