**Please ignore the horrible pun. I usually avoid puns, but it was so fitting that I just kept it** (not that anyone will read this anyway)
This episode is very un-Buffy. Its a quirky Soylent Green meets Burger King episode filled with awkward dark humor, and there's a reason for this: Its very reminiscent to Daisy's half of the Spaced episode "Mettle", down to the awkward boss and "mysterious firings" (though the morale is ruining creativity vs. unhealthy food). Still cool that someone else appreciate awesome British TV shows.
Anyway, from the reviews, its a very underrated episode. The whole surreal nature of the episode works really well. Working in fast-food, the whole atmosphere is sadly realistic to how its really like. A great parody, really, and a great way to break up the season's depressing story arc. The biggest con is the effects of the baddie at the end is so low-budget it looks like something from Troll 2. I mean, its really laughably bad. Guess kinda fitting with the B-movie plot, but they really coulda tried a bit here...
Its really a love it or hate it kind of episode. I kind of get the complaints that its a one-off sort of plot that should of been a sidepoint rather than a whole episode. I mean, Spaced dedicated like 5 minutes of the episode on this, while the rest was robot wars. Then again, the Soylent Green aspect wasn't really there, and the show's a legit comedy.
Watch it, and you'll definitely form an opinion strong enough to go on IMDb and write a review. Whether you like it or not, its definitely a memorable episode.