About as amateur as you can get without being some fresh college kids with a $200 camcorder and a lot of free time.
Strikingly engrossing as it's fascinating to watch what a bunch of people can do with a budget I'm guessing is in the triple digits, mind you, that's including a decimal.
Most of the ' virus ' activity is just reversed footage of green Gelli Baff funneling down a pipe, sometimes it'll be reversed footage of it being dropped on someone, or reversed footage of it falling off a hand.
The story isn't worth talking about, the main plot is nonsense, there's some subplots that were clearly forgotten about, and none of it goes anywhere.
A lot of acting that would make any plank of wood seem worthy of accolades in comparison and special effects found in free editing software, scored brilliantly by stock music that really amps up the atmosphere of ' horror movie at the local dying theater '.
Truthfully, a movie to watch when there's nothing better to do and you want to waste an hour or so.