My hypo awareness is usually pretty good, sometimes too good and I’m actually fine 
There is the odd occasion I have felt fine and then suddenly realised I’m down at 2-3, but that’s pretty rare.
I’m pretty laid back about hypos, probably cause I’ve never been hospitalised, so the only negative is the horrid feeling, which is a pretty good motivator, but not the same as needing proper help. In fact I’m probably a bit TOO laid back – I have walked 5 miles home from work starting hypo, and eating my way through a whole pack of dextro tablets. Not smart – was 80% along a canal path with no-one for miles. But then bad judgement is one of the side effects of a hypo! 