Well, you've already figured out the advantage of not having to mess with a mechanical release.

The disadvantage is exactly what ShadowAce mentioned. It's difficult to get exactly the same release each time with fingers and that can play havoc with accuracy. However, the difference in accuracy for a good fingers shooter vs a good release shooter is measured in fractions of an inch. It just takes a little more practice to become a good fingers shooter than it takes to become a good release shooter.

Another disadvantage for fingers is not many of today's bows are worth a flying flip for shooting fingers. High letoff and short axle to axle bows... bleh! Like wwag mentioned, you can make the transition to shooting such bows though. You might even have to drop two fingers off the string and use a 1-finger release with a very short, high letoff bow.

I would not recommend wwag's 'creep release' method. I prefer to pull into the wall and let my back tension pull my fingers through the string. Doing that, I'm releasing with the exact same draw length each time.

Now, releasing the string... Saying you release the string is really a misnomer. It implies that you have to do something. When it comes to the release, you do NOTHING. Read that again. YOU DO NOTHING!

You are already doing something, holding the string at full draw. To make the release, you simply QUIT holding the string and allow it to escape. It's a simple matter of relaxing the fingers. The string pushes the fingers out of the way and leaves. If you want a suprize release, you allow the fingers to relax s-l-o-w-l-y, and the string will eventually overcome the holding force. (Frankly, I think the suprize release is highly overrated and not really all that desireable, especially for a hunter. JMHO)

Anyway, a fingers release is completely different from shooting a mechanical release because with a release you have to squeeze the trigger, rotate the wrist or perform some other physical action in order to activate the release mechanism. It takes a while to retrain the brain to the idea of initiating the release by relaxing.

You will have to decide for yourself whether you prefer to shoot with a glove or a finger tab. I go through spells where I prefer a tab and others where I shoot nothing but a glove. I'm currently in a glove phase. My preference is for the Damascus glove. It's very thin leather, snug fitting, and allows a good feel for the string.

When my tab phase kicks in, it's usually a NEET PFT superleather tab or one of the red-n-black Black Widow tabs. I have a serious dislike for calfhair tabs. As the hair wears off, the string begins coming off the tab different from one shot to the next.

Head off to the drug store and get yourself a small travel size can of baby powder to stick in your pocket. About every 5-10 shots, powder the string contact area of the tab or glove. Makes for a slick release.

You will likely need to change rests and, naturally, retune the bow for fingers shooting. I'd suggest getting an NAP Centerest flipper, set your nockset so the bottom of the arrow's nock is 1/8" above square, and set your centershot where the tip of the arrow is slightly outside true centershot. You'll need to play with your centershot position some to get it set right for your release. With time and experience, as your technique improves, that centershot position is likely to change.

Give me a holler if you have any questions.