Since I learned that I have neither the patience or mental fortitude to sit in front of a screen all day manual trading, I have devoted a huge amount of time to writing and using trading robots. They have none of the manual trading problems which plagued my personal experience such as the need to sleep, eat, go for a bathroom break, panic or just plain finger trouble.
Having said that, most robots are sold to profit the vendor rather than the user. They are incredibly over-hyped and contain lies, more lies and forged backtests to name but a few.
Also, most robots are built to scalp the market rather than on longer term trading principles which in my opinion is a shame.
The only way to find good robots is to look for honest websites and read all the forum material from users before taking the plunge.