Ah, yes, the MGs. My very first Marshall was the MG30RCD. That was around 20 years ago already? Holy shit.... anyway, I still have it, and I occasionally use it. Right now, it's with a friend but here's a pic of someone else's:
When I put an a little 15 mg head through my 1960a I couldn't believe how much better it sounded, but still not like a tube amp. Way better than whatever trash speaker they put in it though
I'm pretty sure I read somewhere at sometime that Zakk Wylde uses them quite a bit for practice, etc....
I've heard people getting decent tones with the 2nd generation MG heads. The first generation (G100) seems okay, and the 3rd and 4th sound pretty bad in my experience. None of them compare to the Marshall 8100/8200 or VS100, though.
Sorry, but I think they are a POS. No depth and fullness, even with a speaker change. sure, some can get a mediocre sound with lots or upgrades, but after all that, why not just get a tube amp?
A tube amp would sound like a piece of shit through bad speakers too. Just a slightly better sounding piece of a shit.
When I purchased my grandsons mg half stack , I got it for 150$ a Craigslist score, it served him well, and it was sold for 225$ 6 months ago, the new owner is happy as hell with it, and he and his band are doing well, and at the time of my purchase even 300$ more wold still be short of getting a good tube amp, so I stilll believe it is a viable option!