To be fair Mintex are priced in the midrange category.
Because of the name . Their aftermarket spec pads are definitely not god enough to be classed as midrange. They are budget.
Brembo also do (expensive) cheapo pads, which are also shite. And not to be confused with the decent stuff sold through specialist outlets.
On an Omega, you have a simple option for cheap - TC pads. Nothing in the sub £50 bracket comes close. Only downside is a dead feeling for the first 100 yards when they haven't been used for a few days. Around £15+VAT on TC, or free with the (also very good) TC disc sets.
Why oh why people piss around with other cheap pads on an Omega is a complete mystery to me.
Not wanting to be argumentative on the subject of Mintex pads, but my thoughts about Mintex has to be formed on the basis of my own experiences - I have fitted Mintex for many years in different cars ranging from Honda, Audi, VW, Kia, Vauxhall, Renault, Peugeot, Ford (can't remember all the other vehicles I've fitted them to), and I've never had any complaints, either about pedal feel or noise. Fitment has always been good too (no filing to fit). Their pads that I have fitted to my own cars have also been very good.
So I personally don't quite get the statements that Mintex are shite - just as similar comments that Bosal exhausts are cheap and nasty, which I also have to disagree with.