No breaks, but had two times where it fell off.

one time in melbourne with an aussie girl, expensive punt as well, she was on top and somehow it came off.. she couldn't even find it :/ she freaked out, ran out of the room to get plan b session over. fucking waste of cash.

only other time was with a young asian girl at a local joint, came off while I was in doggy but didn't notice until after, ended up blowing my load inside her. she didn't seem to care.