The mod requires nothing more than the latest version of Skyrim.
Well, not quite purple. Indigo, or a bluey-purple color. Some of you might be complaining about the unimmersiveness of it already. But there's more. He speaks in first person, unlike most Khajiit. But the author, smartbluecat (or Gary), does give some fairly good reasons for this. You can find those in the FAQ of the mod page. Suffice to say, there are reasons for Inigo's strangeness.
Inigo is a follower with a lot of cool features. Aside from basic follower functionality (following, sharing his inventory, fighting alongside you, etc.) he won't use a torch when you sneak, talks about his surroundings, is fully quest-aware, and will share his thoughts with you if you ask. If you're annoyed with how often he speaks, you can find a Necklace of Muffletongue in the location that you find him in. Put it on him and he won't speak as much. I, however, enjoy his talk. It's funny, interesting, and eerily accurate.
If you speak with Inigo while you're seated with him in a tavern, it opens up a whole new avenue of conversation for you to explore. You can ask him how you're doing, and he'll talk to you about your skills. Or you can ask him to read certain books to you if he has them, or even make him dance or sing while in the Bard's College. And as you get to know him better, you can learn even more about his background and past.
Inigo has thousands of lines of dialogue, and much more to come, including a quest line, new NPCs and much more. Even if you don't download him now (which I highly recommend), you should definitely keep an eye on him. Inigo is a viable alternative for even the best follower mods out there, and I think - even better.
What mods would you like to see reviewed next? Tell me in the comments below.