I've flown 6.5 hours this week with a pair of budget Harry Mendelsons which cost me I think £80 about 6 years ago. I'm not sure quite how many hundreds of hours I've flown with them but I'm only just starting to think about replacing them. (Although to be frank, that's only 'cos I'm getting fussier, they still work very well, are extremely robust, and the only thing I've ever had to do with them was replace the foam mic-sock a couple of times.)
And I may well think about their own-brand sets again.
DCs are of-course excellent in isolation, but can be a little tight for long trips, and also sometime suffer compatability problems with other headsets. I'm not the greatest fan of them.
G