I had the same questions before using mine so I made it a point to log using it and putting it on the wiki (https://gswiki.play.net/Fixstats)
Here is what it looks like when you drink it:
Code:
>drink my potion
As you raise the green potion to your lips, you stop for a few seconds to ponder the consequences of drinking it.
[Drinking from the potion will allow you access to the Stat Reassignment menu in the Character Manager. Reassigning your stats may require changes in your prior skill training selections if your net Training Points (TPs) change as a result.
It is suggested that BEFORE drinking this potion, that you should make use of any existing FIXSKILLS option that you may have to free up these points. After drinking from the potion, your FIXSKILLS option will be reset.
If you understand this and would like the opportunity to reassign your stats, please DRINK from your potion again within the next 30 seconds.]
Roundtime: 3 sec.
>drink my potion
You take a sip from the green potion. You suddenly feel the urge to lie down and rest. Perhaps you should CHECK IN at the local inn?
[You have been granted 1 stat reassignment. Please enter the Character Manager at a local inn and select the Reassign Stats menu option to proceed.]
That was the last drop.
The green potion shatters into twinkling dust.
Roundtime: 3 sec.