(It seems though all who promote this, end up going with (2) units).
... not ALL!

The stereo sound from my on board speakers, and the mono coverage from the Bose tower has been all I need for many years. I've said before, having 2 Compacts can actually have a negative effect in some settings. They need room to spread. If they are placed too close to each other, you get cancellations, and dead spots. Placement is critical, if you want to use two arrays.