These need laser sights on the top to get the aim right.
Initially I thought your having a laugh, in comparison to my set up. Empty, week and very quiet.
BUT, tilt them forward with an inch and a half book under the rear foot, move them further apart and aim them DIRECTLY at my arm chair, and yes they do impress.
Accurate, tight as mentioned and within that small aim is an entire band. Easily picked out is each element. Ramble on by Led Zeppelin offers a tappy Tom-toms on the left, guitar on the right, and Robert Plant singing right in the middle where there's no speakers at all.

However... Are they that much better than my current 5.1 set up. Over all? No, the 5.1 gives a slightly fuller more vibrant and FAR wider spread of sound. For general use, no not the quads.
But for personal more selfish use. Like a man cave or personal listening area. Yes, even in simple stereo over the various sound fields in the home cinema.
Source is MP3 over wifi to amp and then quad speakers. Crisp hiss less sound.
Try a CD later.
I am a bit concerned how quiet they are though. They need about a third more volume.

(eeek)