If there's a more convincing NPC in all of interactive fiction, I've yet to come across her. (I do dearly wish that Emily's updated Versu version in which one can play as Galatea had been made available.) Conversations don't get more plausible than this in a parser format.
It's also worth noting that, along with Aisle, this game introduced me to the peculiar strength of multiple endings in IF - that it's a format in which one needn't assume that any particular reading of the text is the correct one (let's face it, your average Choose Your Own Adventure has a great many bad endings, and tends to implicitly prioritise *winning* ones). This is a delicious storytelling technique for anyone even the slightest bit intrigued by metafiction, and I'm surprised it isn't used more often. Well-written to boot - a joy to play with.
There's a certain type of SF literature which is near and dear to my heart - initially small situations opening out upon a rich and unknowable scope of universe. Olaf Stapledon and Cordwainer Smith are both rather good at this.
So after coming across this sort of language in a text adventure, I couldn't not but give it five stars. Every word is well-chosen and matched for the mood. Recommended for a meditative midwinter's night.
The definition of well-implemented. A beautifully simple game in which just about anything you can think of will have a witty response. As someone deeply interested in the intricacies of what can be done with a parser, it fascinates me.
Besides, it's a lot of fun.
Confession: I never played any of the original versions, instead coming on board with the BBC Radio 4 20th Anniversary Edition, which is in many ways kinder to the player; it came complete with the game itself, but also some simple but pleasing graphics, interesting game design notes, and all the Douglas Adams hints. That page is still here, although the game is currently hosted here. (Apparently this is the 30th Anniversary Edition, which is like the old one but with a shinier interface and, erm, the ability to tweet from in-game. Perhaps just as well, if the brush-up allows the game to be around for another ten years.)
Anyhow, it's gloriously implemented and perfectly atmospheric. Definitely worth a try if you're at all a fan of the radio series/books/movie/stageshow/whathaveyou.