Maybe it's me, but I don't see the logic in spending as much or more on a soundbar system that has less flexibility and worse sound quality than a mid-level AV receiver, 5 speakers, and a sub. From the picture it's pretty unattractive, you aren't saving that much space, and eventually upgrading the components is probably impossible...
I genuinely do not have space for a receiver, 5 speakers, and a sub. Sound bars are great for saving space.