The beans is not guaranteed to leak, short term or long. Dumb A$$ statement. Thats like saying the FASS sump will eventually stop working long term or short. Anything in the world, mechanical or natural is prone to failure. Its the world we live in
Its a easy install, cost effective and works great. I have installed the beans on mine, and the multi layer tank is thicker than one thinks and the sealing aspect of the beans, or BD Sump works great. Some argue it hangs low and you could catch it on something, but really, when is the last time you hit something on your tank.
OP it boils down to what suits you best. Cost, install time, reputation of the product and does it work. Beans Or the BD sump have proven it does. The Fass will work too, but at more money and more install time.
Bottom line, either one will work for you.