Arrowspeed is the Kwikfit homebrand and in a What Car test braking from 70mph in the wet they stopped the car around 4 metres worse than the Continental Premium Contact 2.
In the dry it was something like 2 metres worse.
So yes, they were not quite as good as the best premium brand but not that far off.
Had Pirelli’s on my Mondeo then switched to the Arrowspeed -the latter were much better in all areas of use. In fact, I would go as far to say the Pirellis were awful, I swapped them out long before the minimum wear was reached.
Obviously if I had gone to Continental/Michelin then they would have been better. But if I had bought a Bugatti Veyron then it would have stopped and cornered better than the Mondeo as well.
You need to balance up your driving style with cost etc to make the call.
In my opinion the Arrowspeeds were close enough to the better brands to be worth saving a significant chunk of cash. IIRC they were less than £200 for 4.