This is a movie that has a somewhat interesting premise, but with generally poor execution.
The Collector supposedly tests his victims to decide which of them he will "collect", however the film displays very little evidence of this; the man and wife of the family being tormented are simply held in the basement and tortured, which reduces their home being filled with traps to nothing more than an over-engineered means of preventing escape, as the only people to actually fall foul of the traps are people that weren't expected to be there at all. There is no sense that The Collector has planned any of this, or is following any kind of pattern or ritual, which leaves him as little more than a silent slasher villain rather than any kind of true character, and while the fact that he collects people is hinted at, it is never elaborated upon in any meaningful way.
In the end this all results in a film that mostly just glorifies in its gore and trap design, reminiscent of the later Saw films (which coincidentally shared the same writers), but lacks the hook of Jigsaw's twisted sense of purpose. There are no real scares to be had, and limited suspense, leaving us a horror film that doesn't really work all that well on any level besides mindless viewing.
It does however have its moments, such as Arkin, the unfortunate would be thief, struggling between his own survival, and rescuing The Collector's victims whom he had come to rob himself. However, this doesn't make up for the wasted potential of a film that seems to have become little more than a means of introducing a trilogy. There were great opportunities for twists to add some substance, for example if The Collector knew all along what Arkin was planning, and that the house was in fact engineered to test him and not the unlucky family, but instead The Collector's haphazard brutality simply lurches around without any clearly realised plan, just like his film.