I bought it for the sniper first and I can tell you it definitely works. Then, in one of the recent updates, it included a copy trade mode, so I switched my strategy from sniping to copying trading, and that update was done by the dev for free. Didn't use sandwich trading yet so can't tell anything good or bad about it.
Tip for consumers:
It's good to make a few tests before you start.
I'm using pancake sniper plus for more then a year. Worth every penny. I got my investment back in two weeks or so.