Using this service is a clear violation of the EULA and if discovered is a bannable offense.
There are certainly those that have been banned using it, however that isn't to saw bans are a common occurance.
If you do not AFK bot, you stand EXTERMELY little chance of ever getting banned, the only people I'm aware of that got banned for attended botting were using aditional hacks, or duping.
However, if you leave your toon running harvest unattended you run the chance of being banned, the more you run scripts unattended, especially in open zones where they can be observed by the player base, you run the risk of being banned.
I'm not aware of anyone ever being banned while attending scripts, or using the software to 'box' a character.
Your results may vary.
The community consensus is, don't start running scripts unless you plan to get banned. This motto comes from the only person responsible for getting your toon banned is you!