AT2020 : Very good first mic but I would pitch in a little bit and go for NT1 or NT1A

USE: This is my first mic and it works really well for acoustic guitar and as well as vocals.

CLARITY: It picks up a noise especially if your room is not sound treated but if you put the mic close when singing then it should not be an issue. It's also really good for acoustic guitar. Overall clarity seems really up to the mark, given that this is one of the starter mics.

PROS:

1. Well built, like a tank. It's nice and heavy and feels really well protected.

2. Good sound for the money for Vocals and great sound for Acoustic guitar for the money

3. Non-muddy sound

CONS:

1. Picks up quite a bit of noise

2. No gain control on the mic

3. No switch for on and off

4. Only Cardiod pattern

UNDERSTANDING:

Even though there are cons there is nothing you can not do in post production. It's same as photography. Even the lowest cams can shoot really good pictures. If you have some more money go for the NT1A or NT1 better, and if you don't this is more than enough to get you started.