I have been using tradesanta for around 3 months and i can definitely say it's a reliable service.
Setting up a bot is pretty easy and you're going to find a lot of support in their telegram group.
I haven't experienced any server downtime when i used it. There were only some minor bugs that can be neglected.
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...and ability to really deliver the results we all wanted?
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Well this highly depends on your own settings and chosen trading pair - like with all bots! There is no trading bot you can set up once and leave it open forever. You will need to adjust according to the current market situation. All in all i had some good results using the Bollinger Bands signal with BNB pairs on Binance.
Tradesanta would be my first choice when it comes to
free trading bots.