I'm running this exact system, only difference being I added an active sub (also Carvin) to it.
My experience has been good overall. It is a great sounding system, but it could use a bit more power at times. I've run my whole band,( bass, guitar,drums, two vocals) into it, and it is LOUD. The horns seem to be the weak link. I've pushed mine pretty hard at gigs, and I've had those moments where I felt like it was all gonna blow, but didn't.
That said, I've definitely heard better. I think if you get it, I would go with two subs instead of just one. For me, one just doesn't seem to be enough.
Without subs, it is a good system, but just because they say the lower 15 works as a sub, don't expect groundshaking lows. It is NOT a subwoofer. It is crossed over for lower frequencies and the two 15's DO sound great together, but for really low lows, add a sub or two. You'll be glad you did.
Oh, and there are NO pole mounts on them. Sucks cuz I bought the extra package with the stands when I bought the system, and can't use them. The stands arent rated to hold the weight of the speakers, and the speakers have no pole mount.
I love the included mics. Actually ordered 4 more of them, they sound so good.
The speaker cables included are 50', and seem to be decent quality.