Originally Posted by DaFriMon

Yes, although I have only done this a very short distance to see if it would work. Haven't tried it in difficult real world conditions, such as weaving through crowds at a train station.

There is a large bracket (has to be bought separately) which attaches to the head tube and stays on the bike. That does not interfere with the fold. The Klickfix accessory I bought is a wire basket, and no, I wouldn't be able to fold the bike properly with it on there.