From an install point of view

Its hard to get their locations perfect unless care is taken in the rough in process. This means pre locating seating, screen, and sub locations to account for room modes. Retrofitting in-walls into existing rooms usually means modifying studs to get the channel to agree with its reciprocal channel.

Then you are bound to their location from an acoustics/tuning standpoint. If there is something wrong with a location, like an obvious peak in response, you must use EQ to fix it. Moving the speaker isnt an easy option. smile

The huge positive is how clean the final install looks.