I bought this amp to start practising electric guitar. The tones I was searching for were the angry-metal tone and some bright, "glass" clean tones. The bunch of effects and presets that the manufacturer assures is really decent, although you will not need the whole 100 of them. I loved the versatility of this amp, you can play blues, jass, get some light-rock tones and there are a lot of switches for you to choose from. In comparison to the MG series amp that I listened to at my friend, the CODE is obviously better at tones and the sound is cleaner and clearer.
I dealed with some problems in using the USB-recordin feature, because, first of all, the sound that is recording is different from that you are hearing when playing, and I also managed to accidentaly break the port.
Also, at the begining you may find it a challenge to understand what tones give you the amps and the cabinets and the power-amps and the whole lot of switches it has, but in an hour of messing up with them - you'll find what you need.
The bluetooth feature is usable and really useful, I used it multiple times to just listen to music, but it also allows you to play along a track or cover some songs while they're playing straightly from the amp. Also the Marshall Gateway app is very good as a remote-control for the amp, and with it you can hold 200 presets - a hundred on your phone and a hundred on the amp (but you will not need so much of them).
As a conclusion, I admit that this is THE BEST amp in this price category and may be the single one you would need for practise and is a decent one to play somewhere live, the sound is really good. Even if I didn't gave it at every point 5 stars, overall it truly deserves it.