I strongly suspect that this band have been labelled as one that you're not supposed to like if you're a 'proper' muso - in a similar vein to a band like Coldplay - and the reviews are being a bit over-zealous as a result.
I would have assumed ahead of time that this album would contain the big smash-hit single, and then a lot of uninspiring filler, but it's way more musical than I thought it would be. There's some great melodic guitar in here, some funk grooves, chill backdrops, harmonica, brass... I think it's really interesting musically.
I think this is really good. Forget the haters. And it IS fun.