Yeah, it is unfortunate that very few people know about them, and quite underrated.
I've pre-ordered my 'ONE LOVE, ONE DAY, ONE LIFE' 2 days ago, can't wait to listen to it.
I've gotten around to buying all their albums already, I ordered them straight away as soon as I got my pay from my first job several months ago.
Couldn't afford them earlier other than 'RAINBOW', which is cheaper, considering their albums are only available in Japan versions.
Personally, I'm not that excited about their PVs though, but I'd love to hear a live from them since I've never seen any of their lives.
PS And it sucks that their releases don't even get into the Top 30 most of the time.