Well, the Little Busters dub is terrible. Greg Ayres gives his usual ear grating performance playing Masato (Seriously, who thought it was a good idea to get Greg Ayres to play an 'alpha male' character), Komari isn't as annoying but only because they failed at trying to replicate her vocal qualities, Brittany Karbowski and Blake Shepard don't fit at all and Riki sounds less like a boy with high voice and more like a middle aged woman trying to sound like a boy.
Strangely the one thing I thought for sure would screw up is the only thing that worked. Kud's broken English is actually, well, cute. I had my doubts when Tiffany Grant was cast and who can blame me? Asuka playing a Russian loli sounds like a terrible idea on paper which for Sentai dubs usually means that it won't work at all. Then again, Tiffany Grant isn't Greg Ayres. Like most voice actors, she has a magical trick where she change her voice to play all sorts of characters.
But apart from Kud, it's pretty bad. And as if the dialogue in Sentai dubs doesn't sound awkward enough already they decided on retaining the honorifics. I really hope the Girls und Panzer dub doesn't do that. They should probably also keep Brittany Karbowski away from it before I start to hate her voice like pretty much every other Sentai regular