Useful Device: Capo

I purchased a Capo last night for my guitar. I wasn't quite sure before the purchase exactly how it would change my playing, but I kept seeing that some tabs stated "Capo 1st fret", etc.

It became very apparent after using it for the first time exactly what it does, and the effect is awesome! I can change keys without changing the voicing of the chords and without barring (which I have problems with for whatever reason).

That is, if I place the Capo on the 3rd fret, and then play the Em chord relative to that Capo, then I'm actually playing Gm without needing to bar the 3rd fret with my finger.

It's only useful for wholesale key changes, so it doesn't solve all of my barring needs. But, I think it was an excellent investment of $15.