A lot of this film is just pure cheese, it's piled high with silly acting, stupid dialog and dumb characters. Lithgow at least tries hard enough, but he doesn't stand much chance in the face of a flood of cheesy plotlines recycled from soaps (check out the dying-wife-in-hospital scene, or any of the evil-twin moments, for examples) and pretty poor support - some of the characters seem barely able to keep a straight face as they deliver their admittedly stupid lines. At least it seems to make some sense by the end, having seemed hopelessly confused most of the way, and for that at least some credit is due.
Though normally I would count myself a De Palma fan (I even thought Bonfire... was quite watchable), I would have to class this as a bit of a turkey - for some discerning viewers it may even cross into so-bad-it's-good territory, but for me the few decent ideas on show disqualify it even from that, leaving it floating in the dreaded no-man's land of stupid, uninspiring and insipid. Pants.