This might be worth a read: http://www.moneysavingexpert.com/insurance/level-term-insurance
a mortgage often lasts 25 years or so, and not many people stay at the same employer that long anymore...
True, but not many people stay with the same mortgage that long anymore either. Since buying my first house I've remortgaged (changing both equity and term length) as many times as I've changed employer.
If people are concerned about losing their DIS cover in the future when changing employer, it is worth bearing in mind that should that be on the cards then in theory there shouldn't be anything to stop them taking out life insurance.
Anyway have a good dig into the T&Cs as it could be that you require only life cover and not critical illness as well, even if the broker is pushing that.
Life insurance gets more expensive as you get older, and if your health has deteriorated it can get very expensive. Buying insurance 'early' when younger means that you only need to top up the shortfall in cover later on if you need more.
you still need life cover imo. You can get it so cheap you'd be stupid not to.