Here is an unboxing, review and demo of the Audio Technica AT2041SP microphone studio pack, which includes both the AT2020 and AT2021 Microphones.
I have included raw audio recordings of voice, drum, amp and guitar to help with your evaluation. These recordings were made in a very simple "throw the mic up and go" way. No EQ, Dynamic Compression or FX of any kind has been added to the demo section of this video. Rather than putting the mic in a perfect room, with perfect gear and a perfect player, I chose to show the mic in a more general user light.