I have one of the Halfords pro toolboxes with drawers – red steel job. It's well made and weighs a lot on its own. It cost a fair proportion of what that entire tool set cost.
I've also had a fair few cheap spanners – you can get chrome vanadium kit for very little money, but the problem is that it's rarely made to good tolerances, so you round off nuts. I would suspect (and the reviews suggest) that toolset fits into the cheap and badly made category.
Of course, you could buy it, see if they are well made (ie, try undoing a few nuts and bolts with them) and take them back if not.
Halfords pro level stuff is fine, as are Sealey's socket sets.