I tried bid bots, didn't liked them. Too wasteful. The tool for watching bid bots is nice, but you it shows only the how much you would make if nobody else makes a bid after you. If someone makes a bid after you the profit calculation changes.
Personally, I prefer to use minnowbooster. It didn't disappoint me till now.
Thats why the Next Vote timer is so important, the best concept is to wait until just before the bid window closes so you bid right before the bot starts to upvote that way any bid that comes in after yours will be counted for the next voting window and not affect your bid.