In reply to Derry:
I've got a pair of the ClimbX Crush Lace, have done for about a year and a half now. I wear the same size as I do in every day shoes (UK 9), and they're comfortable enough to not take off between climbs for a whole day of trad- if I was climbing harder I might appreciate a half size down. They are a budget option, but they've lasted really well and I'm pretty sure they're not the limiting factor in my climbing.