Watch out for "false" daisy-chains, tied up by the uneducated into far more complex knots, in the mistaken belief that they are being helpful. These take somewhat at longer to untie and are the bane of wall staff's lives
In reply to Jamie B: I've never quite managed to see exactly how they get it wrong to show them otherwise... I've watched them and it looks the same but then they somehow get it looped through and it won't come undone.