The thought of having one of these bio's would give me endless worry about when the "board" might start having problems and the whole system breaks down. For the price I expect a lifetime guarantee but that still doesn't help unless you another one running too
. I like the grand myself but could never justify getting one for any of my critters. I prefer the "seperates" approach for the simple reason that you replace any faulty product alone without too much interuption to your setup. It is why I don't have a climate controller either incase something goes wrong electronics wise. Plus, you buy what you specifically need instead of what is given to you in an all-in-one system.