*Great* giant snake movie.
IMHO, this is the king of the hill as far as giant snake movies go. Okay, damning by faint praise. But it's unique as far as I know in that it's obvious this movie had the involvement of people who like and are actually knowledgeable about snakes. The snakes are not one-dimensional generic monsters. They're snakes! That alone puts it ahead of most of the pack.
It's got decent humour, decent action, and great effects for a low-budget B movie. Plus, it's got David Hewlett. How can you go wrong? I was pretty down on this the first time I saw it out of pure negative bias ("aw, another awful giant snake movie"), but it managed to keep me from walking away half-way -- no mean feat for a bad movie -- and with repeat viewings I came to realise it's actually a great B movie. If you can appreciate the style, it's worth a view.