Playing the game - yup, it's basically all dialogue! :3 And rather superb dialogue too!
If you're a big fan of Adams I'd say it's a must. It gets quite a bit frustrating, some puzzles are very difficult but frankly it all adds to the experience, in a way. Plus nowdays we have online guides, hehe.
The story is a bit too slow maybe but the dialogues and overall feel are worth it, I think! If you're into his kind of humour then you'll probably like it :3