There was one in the music store where I teach and it sat for quite awhile. Like a lot of other all in one systems more designed for the acoustic guitar / singer types. No bottom end for keyboards and I think it was expensive for what it was.
I'm repeating myself but for portability and big sound the best all in one I've seen in person is the JBL Eon One.
They just finally sold a Maul System which also sat for awhile. It was the model with the 12" sub and it sounded very good but lost it for me in the portability factor.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer