For starters... Good to see some downloadable content.
But I do have some problems with it.
First of all. I know it's cheap. But...
It's horse armor. And I remember reading in a preview or two that it was gonna be in the game. I don't remember them saying it'd be an add-on. But actually in the game. So if my memory is holding true, I'll be paying for something thats supposed to already be in there. No likey.

Second and probably my main gripe, but I guess it's not something I can hold against them - Some people lack the internet connection.
I don't do Xbox Live because I don't have Broadband and we can't get it down here yet and probably won't for awhile.
I doubt an alternate distribution system would work for something as small as a tiny bit of armor for an in-game horse, so I hope that in the future - when/if an expansion is made - that some of these little additions are included in the expansion and I can pay for it that way, as is I just can't really get it, as much as I'd like armor for my Shadowmere.