I think this option varies with traders, as circumstances may vary. Some might have enough time follow the market every step of the way, while others may not have such luxury.
But whether we choose to trade manually or automatically, we should consider all there is to it.
You can get a good guide at: How to Trade Forex: The Pros and Cons of Using an Expert Advisor (EA) on ea's
i'm try with EA. i had profit last week. it is 5%. i hope i will have profit in this week. i do not need trading. i open computer and EA auto trading. i think this is future of this market. we can make money when we sleep
EA's can do a lot but manual supervision is always a necessity. See how we automatic technical analyzer to find the direction.