When we finished our basement this Spring we knew that we wanted to install carpet to add warmth to the space. Carpet was also a practical choice because the concrete sub-floor is uneven and we weren't interested in the cost involved with levelling it. The rubber underpadding that Nicko recommended did wonders to level the floor and the guys finished the entire installation job in a few hours. The edges are so well done that we won't even need to add thresholds where the carpet ends and the tile begins. Their price was slightly higher than others we looked into when shopping around but the quality reflects why.