I have 10 speakers in 6 zones, including a Playbar with subwoofer and two rear 3s. Another 5, 3 x 3s, and a paired set of 1s. The Playbar is wired to my router, first floor of 2600 foot on 2 floors and with a lot of concrete. Services such as Sirius, Spotify etc. all work fine. But using line-in on the 5 (to play Audible Audiobooks because missing the long-promised integration has yet to materialize), I get a fair amount of cutouts in grouped speakers. I am fairly furious about the lack of Audible integration being solved, and don't really want to purchase more product. But if a Boost would solve my cutout problem so my kids can finally listen to audiobooks again at bedtime, perhaps will purchase. Is the Boost any better than the SonosNet created by my wired Playbar? Ready to scrap the whole damn thing and get my kids Echos to solve this Audible problem.