There is definitely many pros and cons to many bid-bots, including this one obviously.
But Megabot is one of the best options for people that would like to invest their SP. If you have some SP to spare you can delegate to the bot and be put in its reward pool. it is a 80/20 split. 80% goes to the delegators and 20% goes back to the bot. Most of these bots are a 70/30 or even 60/40 splits. Making Megabot one of the best bots to invest in. Megabot gives its investors their payout every 20 hours.

If you don't have spare SP and just wish to use the bot I'd suggest using https://steembottracker.com/ to figure out if you will come out on top!

Another bonus from this bot is that @rougebot owns and runs it. He is a minnow himself and he is all for the growth of every minnow (currently a PAL moderator). I believe just because he is under this bidbot it will lead to something so much more. I do believe he briefly thought about letting the bot have runners in the future and even making curation posts that he will look at posts that the bot upvoted, giving the user more recognition and reward.