I have not used any recent bots, but yes I have had experiences with bots earlier and they were not really up to the mark, In fact, some even have problems such as they will hack into your funds or even become buggy after some point in time and make random unprofitable trades which can burn your capital. Some tend to become unprofitable with something as small as a change in trend. Basically, there hasn't been a single bot at least something I have found which is robust enough to serve you as a good trader so that at least your screen time can be reduced.