In short: game is fun, and will help you to get better at guitar/bass.

If you have any interest in learning to play guitar/bass and enjoy playing video games, then this is the game for you. There is a Dynamic Difficulty feature, along with a Riff Repeater (where you can slow down challenging sections) which are the main things that will get you better at playing. There are a handful of video tutorials and practice tracks to hold your hand through the basics if you're a newcomer. If you're advanced, you can crank the difficulty up to 100% (or play Hard difficulty in Score Attack mode, which does that for you).

I have mixed feelings about the Guitarcade (mini games based around a single technique, such as bending, fret movement, string picking, chords, etc). Generally, I only play these to complete the in-game missions and for achievements (which I haven't bothered with yet). They are decent fun, but the meat of the game is Learn a Song/Score Attack for me (which involve playing along to real music).

For the best performance, you will need a Rocksmith Real Tone Cable (works across all platforms). Currently, these can be purchased for ~30 USD on Amazon. You will also want to use a low latency audio interface (plugged directly into your computer usually will be best, but experiment). You may have to increase the Audio Engine setting if you're hearing distortion (you'll know when you have it), but preferably this will be at the lowest setting (1).

In short: game is fun, and will help you to get better at guitar/bass. If you have any interest in learning to play guitar/bass and enjoy playing video games, then this is the game for you. There is a Dynamic Difficulty feature, along with a Riff Repeater (where you can slow down challenging sections) which are the main things that will get you better at playing. There are a handful of video tutorials and practice tracks to hold your hand through the basics if you're a newcomer. If you're advanced, you can crank the difficulty up to 100% (or play Hard difficulty in Score Attack mode, which does that for you). I have mixed feelings about the Guitarcade (mini games based around a single technique, such as bending, fret movement, string picking, chords, etc). Generally, I only play these to complete the in-game missions and for achievements (which I haven't bothered with yet). They are decent fun, but the meat of the game is Learn a Song/Score Attack for me (which involve playing along to real music). For the best performance, you will need a Rocksmith Real Tone Cable (works across all platforms). Currently, these can be purchased for ~30 USD on Amazon. You will also want to use a low latency audio interface (plugged directly into your computer usually will be best, but experiment). You may have to increase the Audio Engine setting if you're hearing distortion (you'll know when you have it), but preferably this will be at the lowest setting (1).