For my part, I can clearly answer with YES! I bought the bot in January and I am still using it! (not with 10 btc though, I don't have so much 🙂
The bot works as expected. (Great work btw, Gunbot team)
That has nothing to do with magic – it is pure mathematics.
The bot buys for amount XXX BTC and it sells for the amount XXX BTC + (your % gain you set in the preferences).
You tell the bot which amount you want to trade and how much % gain you want.
There is nothing the bot can make wrong!
It just can't sell at a loss!