Revel Concerta M8 - any good or like another on-wall satellite speaker?

[Guddu]

In absence of details and reviews on internet, I am looking for any user feedback on Revel Concerta M8.
Basically looking to put a small satellite speaker multichannel setup in a small room, anyone tried these or using at present?
Any words would be helpful.

 

[Guddu]

No M8 user experiences?

 

[Curvature]

This is another interesting on walls speaker: https://jblpro.com/en/products/control-hst

I have not heard this one or the Revel.