Well they are certainly a straight up-and-down indieguitarband, aye. They cover all the basic touchstones, they're not doing anything unexpected. But they are also a little bit twisted over to one side. It's like they're playing through a fairground mirror. The draggy slurred disharmonious vocals, the unpredictable syncopation that creeps in for all of them (are they strung out? are they shit? did they mean to do that?). They play like they're not there in the room sometimes, or not paying attention, but they're tight and on it.
I don't find it unsettling myself, but I can see that they are a bit creepy and off kilter, just a bit. I get it: I got it right away, but lots of people don't, and I think that's because they feel like the tag in the back of your shirt is scratching.
They've got quite a lot of people - even some of the big guns - scratching their heads.