Anyone here can give some experiences or advice or tips when using these grid bots?
I don't have experience at all and I also recommend you also check other sources than what I tell, to make sure you get newer info.
What I can give is a link to a website I've done in the past some translations for it. Those pages (again, not mine and I'm not affiliated either) tell actual experience with some trading bots and may be of help to get an idea.
The page is
https://tradingbot.info and on top-right area you'll see a drop-down with Results
However, make sure you take all precautions when working with trading bots and keep in mind that it depends on their programming, the settings you add and the market conditions whether they'll make you profit or make you lose money.