Has anyone used one or do people prefer 2 separate amps (monoblock and 2-ch or 4-ch amp?

I am asking because I am looking at the new mobile spec 5-channel Amp and realized that it would be a good match for aveo owners since our vehicle is not very big and it does not take alot of amp power to make your music clear.

The amp specs are as follows (all wattage in RMS):

CH1-CH4:
50W x 4, 4 ohm
75W x 4, 2 ohm
150W x 2, 2 ohms bridge

CH5
230W x1 @ 4 ohm
350W x1 @ 2 ohm
450w x1 @ 1 ohm