the Halfords advanced/pro/industrial stuff is good, especially for the price. the quality isn't Snap-On though, supposedly made by SP, who again are good.
Snap-On is the best, no doubt there, but the cost is way ahead of the rest and i couldn't justify teaming up with the local supplier and changing over to them.
ultimately you buy to your needs, if you are needing tools everyday, you buy the stuff that is least likely to let you down, even if it is at a premium.
much like any trade, you don't see a sparky buying the cheap b+q drills, even the makita's in the combo boxes, they buy the far more expensive models because they just last better even though they cost two to three times more.