But it's so easy to wear I don't really mind I guess. Now, APK post a photo b/c I think you're the only other person who has it. I like, don't you?
I like it a lot, but it's one of those garments that is limited with what it can work with. Unless it's something like a HP shirt, the cardigan doesn't really mesh with button-front shirts. It's best suited for tees and LS shirts from Silent or such shirts designed in a similar manner. It can look really great, but can also look out of place. That said, I almost bought it in that grey color (I have the black one), so that should indicate that it's a stellar piece.
I don't wear it closed, either, but thankfully, the belt doesn't wrap around the waist, so it's not obtrusive or clunky if you don't tie it up.
edit: I've also toyed with getting the sleeves shortened a little. I know the long sleeves are intended, but the cuffs aren't small enough to get the stacking effect. You're more or less forced to roll the cuffs as toasty has done or suffer a King Julien fate.
FWIW a long tee is all I'm planning on wearing with, but as mentioned I don't mind a collar shirt. Thankfully I got some hidden placket shirts to mesh with it better. Going to roll cuffs / let them hang long when my hands are cold.
On the contrary, I disagree with all the assessments you made in terms of wear, but perhaps color has a lot to do with it. The one I have is more like a gray / cream color. Seems easier to incorporate than black in this case.