Fact is that it takes over your mouse meaning you have to use a virtualmachine if you want to use your computer at the same time, this is not hard to set up and there is a guide on how to do it on the forums (it is free). I just know someone would bring that up.
Another fact is that you have to pay for the hours you use, instead of a lifetime auth. These hours are not too expensive really when you think about it, once again someone would of course bring this up.
I only use RiD now though on my main, as I feel the safest when I use it. I haven't really experienced any downsides, the community is good and when theres a problem in the bot it is fixed very quickly when you send in a support ticket.
Also the bot isn't as stuffed up as other bots with every update as it does not just use the object codes in order to find what to do.