This was a bit confusing at first, but after running it through a few turns by hand, I was able to get it set up.If you've used a standard timer-wheel based lamp timer for while you're away, then this is based on the same concept. When it comes to setting-up the device, that's where it gets tricky. Using 2-mm sized pellets (what my bettas are used to), good luck getting just the right amount in the each compartment, because at some point you'll drop-in twice the amount you meant to and as you try to retrieve them and you end-up displacing the ring. Then you have to start all over again, which you do, only to find that the pellets aren't getting dispensed as they should, and you find that some of the minuscule pellets got trapped under the dispensing wheel, which means pellets aren't getting swept to the drop hole. And you start all over again.As one reviewer said, the food doesn't dispense the specific feeding allotment at the time you set it for, instead making it more like a trickle-in type feeding as time goes by. I have little problem with that, for the most part, except then why have dispensing at specific times, as the device is supposed to do? Either way, it was helpful to know this as I ran a test run and kept expecting it to dispense at a specific time. You definitely need to run it at least a few days, but ideally a full week to see how if it works for you before you go out of town. In the end, I still had to ask my neighbor to periodically check on the two tanks to make sure it looked like my bettas were getting some food. One thing that I did to help keep track of how the feeder works, is I used a label maker to put numbers on each slot, so I could easily see that the ring was rotating. I wish it came already numbered.Overall, the device is cheaply made and inefficient for small amounts of food, but it works. I would like to see this made with smaller compartments, so that it could feed for more than just 14 feedings, because if your fish is used to twice daily feedings, that just barely gets you by for 7 days, and most vacations are from weekend to weekend, which means you are probably gone for 8-10 days. Feeding a single betta fish shouldn't be rocket science; we're trying to feed a fairly small solitary fish a small amount once or twice a day. It's just that no one has really tried.