It's great, I would recommend keeping a slight eye on it though. And of course bot smart, don't simply select a mith gloves package and walk away for hours. The $20 price tag is well worth it for one account let alone if you ever plan to make multiples in the future.
As for bugs, there are a few you'll encounter and don't always repeat but things like the GE fail safes are not great and I would personally recommend buying all your needed items by hand instead (when you select the quests you want, the script has a tab to view a list of the required items).