I tried a Cube Street (non EX) before purchasing this.
As a PA: Backing music + Guitar + Singer this is the unit to get. Period.
The set of speakers have a much better overall sound for the job, pristine highs and more bass and is also loud.
As a Guitar amp alone is also very good, it is LOUD!...it will give you more than enough dBs even at medium power.
The models are good, certainly usable, I like specially the Clean and Overdrive tones for Jazz, but I tried the crunch/lead and sounds about right to me, good bassy chug chug sound and good metal lead.
The reverb is quite decent and you DO need it since is stereo and your guitar input is gonna be mono (they could do it stereo I guess, but that means double the DSP taken by the amp model)...so with this unit you want to use mono based FX pedals as Gate/Comp/Mono Chorus/Delay.
You can also connect your guitar to the Line Inputs, so if you have a stereo pedal (as a MT100BT) it would work perfectly.
I don't think the reverb sounds metallic or unpleasant at all, the delay could benefit of some volume knob, currently you can only adjust the delay time with the knob. Thankfully Roland set the delay volume so is usable in most scenarios, from slapback to long delays. I'm gonna be using my FX pedal anyway.
The three band EQ in Instrument/Mic sections is very welcome, I had troubles getting a good voice on the smaller Roland Street as it didn't have a "mid" band.
I think this amp has everything you need, plus the portability. It is indeed not as heavy as it looks.
I would recommend the smaller Street for those who need just a guitar amp, I've got the Red one before and is light loud and very cute for just a guitar. But for those wanting an all round solution this is the way to go.
I will probably buy another at some point to have the pair and be able to open the stereo.