We don't have family nearby to help us with our fairly new fur baby, and on the verge of an out of town trip, decided to splurge to get this feeder so we could know our new family member was well taken care of in our absence. The app was a key reason I purchased this feeder over many others, and I loved I could record my voice to let Lester, our cat, know his food was ready. More so than our voice, the sound of the kibbles hitting the stainless steel bowl emit throughout the house, and he has caught on quickly that it's meal time when it occurs. The app also allows you to do scheduled feeds or manual. We did a manual feed the first time to just see how it worked. The portion sizes are in grams, so for US imperial system users, a quick conversion is that each portion is 10 grams, and 10 grams is approximately 1/8 cup, which was perfect for us to break his daily food allowance down into four portions, as he gets sick super easily with meal times. I used two pieces of wood to prop it up to keep his neck straight also. This is where, however, I took a star off for portions because I would have preferred to have had more control over the serving size. They are set up to where you can do multiple portions at once (so it looks like 1 portion, 2 portions, 3, etc. -- it's a slide), and it says each is 10grams, but I think it would be nice to be able to set the grams yourself, like I'd like you to dispense 15 grams. You can't do halves or quarters. It's just 10 grams x however many you want. Does that make sense? For us it works, but I can see how for others it may not. Using the app was easy and once it's all set up, you can remove feeding your cat from your daily to do list. The feeder is small, but it holds a good bit of food--more than the tin container I'd gotten from Target Dollar Spot for our counter, I think. Overall, I highly recommend, and I think it's well worth the price if you are in a situation like ours where you need the ability to feed your pet while you're away, or even in the middle of the night (like us also).