I haven't watched this film for a few years now but I remember it well as it was a real no brainer fun watch that I viewed several times on a battered old VHS copy. The plot is paper thin and not much above the usual T.V. sci-fi episode in fact I'm sure the an episode of Babylon 5 has a similar plot (TKO in series 1 or 2 I think a coincidence as Claudia Christian appears in both). The effects are basic the budget was probably minimal but this doesn't matter it's the vision of the future that sells this film you need to let go and use your imagination and when you do it kinda works. If you just let the poor effects go and some hammy acting in places you'll get some solid entertainment but you really do have to be in that B-Movie kind of mood to enjoy it.
The fights have to work around some ambitious (for the budget) alien anatomy and thats this films creates strength it tries to stay away from all aliens being basically humanoid shaped and throws the occasional curve-ball in there.
Solid not spectacular with a better budget a few extra sub plots this could have been very good as is a solid B-Movie effort no more, no less 5/10.