I've yet to see a travel lock that would take me more than 30 seconds to get in. And even then, with being able to go through the zipper using a pen trick would negate most of it, even if there was a decent one. I was in Argentina recently, and someone had a 3 digit combination padlock that they didn't know the code to. While we were going a mile in a taxi, I opened it by feel, without even looking at it. This was a Master one, and an easy style, for sure.

I don't have any locks on my bags. Locks are the sign of a sick society.