Still using the same Dualit I bought as a student in 1989, when they were made in Deptford and before Habitat / John Lewis had started to sell them, as they had yet to become A Thing.
I think I paid just over £50.00 for it in what was then The Covent Garden General Store. I'm delighted to see what they come through the till at these days.
As mentioned upthread, spare parts are readily available, although I've never had to buy any.
The only thing I've done to mine is to mount the timer on rubber grommets to reduce the amount of noise resonating through the aluminium body.