Price paid: A$ 60
Sound — 5
I'm using a multitude of guitars through this mainly a Jackson JS30KE with EMG 81 85 pickups, or Epiphone Les Paul Standard. The amp has some good clean tones coming out of it, but it stops there. Once distortion is added the sound turns to mud almost instantly rendering it basically useless for anything besides clean playing. As a primarily metal player I was disappointed, but again for $60 you can't expect punishing amounts of distortion, and especially from such a small amp. That said, it can get quite loud for such a small amp, but the quality of the tone also decreases. Obviously its designed for quiet home practice so I'm not too saddened by this.
Overall Impression — 5
For the clean playing I do, this amp serves me well. For anything else at home, I turn to my faithful Peavey Vypyr. If for some reason the amp stopped working or was stolen I wouldn't buy it again. Not because I hate it, simply because my Vypyr provides much better qualities and is still more than suitable for home use. For anyone looking for a micro amp to play anything but cleans with, this isnt for you. For clean players though, this might be a good investment depending on the specificity of the tone your after.
Reliability & Durability — 5
Obviously this is meant for quiet home practicing so no I wouldn't gig with it. Reliability seems to be decent, I've had it for two months without any problems with atleast an hour of use a day. I can't see it failing on me anytime soon since I don't neglect it, but I wouldn't be sad if it did. Also, this thing goes through batteries rather quickly.
Features — 6
The Marshall MS 4 features a tone, master volume and gain control with an on/off Switch and headphone jack. For $60, you can't really complain about the features. Runs off an included 9volt battery or mains power with an adapter sold separate. Unlike the MS-2 which features a belt clip, the MS-4 uses a stand which I found to be less than trustworthy.