I had the Mag 300 115 combo and 2x10 extension cab for a while, and there was just something not quite right. I exchanged the combo (thanks Andertons!) for this head and an Ashdown 1x15 compact cab, and together with the 2x10 compact cab I already had, this stack is brilliant. A nice deep, bass sound that can be tuned to perfection using the simple controls on the head, and a decent sized stack that sounds (and looks) awesome, yet stands around 5 feet high in total. It doesn't take much tweaking to get a good, loud boom that can be heard over the loudest of guitar amps, an thanks to its size, is easy to transport even if your car is full of cabs!
Over all I love this amp, I have had Laney heads and cabs, a Line 6 combo, and some other bizarrely named thing that was my first amp, and the Ashdown kicks them all into a bucket! and I would recommend this over the Mag combo simply because the larger cab can make all the difference sound wise, while not taking up much space (if you get the compact ones).
Definitely recommend this head, and getting it from Andertons, this shop rocks, the staff are friendly and helpful, and they have so much stuff!