Very good, it solves the problem of being able to leave the house for a few days without having to worry about who will feed the pet. It only supports the smaller size of kibble. Anything else will eventually block or strain the mechanism and damage it. So for larger dogs, you have to compromise and give them the smallest size of kibble in multiple doses. The WiFi only supports 2.4 GHz like most IoT devices, so it is recommended to temporarily disable the 5 GHz to set it up correctly. Also, in mesh networks, you need to disable the roaming option for this specific device. The ability to add a power bank to continue feeding during a power outage is excellent, but it has a small compartment that can fit old small cylindrical power banks, not the newer flat ones like a mobile phone. In terms of reliability, it is flawless, it has been tested daily for months. It feeds according to the schedule even if the WiFi is down. You may not receive a notification on the app because it is offline, but the pet will have eaten. Not suitable for uncovered outdoor areas, it gets wet if it rains. The only thing I changed was the USB power adapter and the cable with something more durable and of higher quality. Not that it broke, but the cable was short and very cheaply made.

After 6 months of use:
The following comments still apply, but:
The kibbles (probably because they are large?) have now damaged it and it gets blocked without dispensing food. The solution I have is 1) I cut the silicone bands on the rotating wheel that dispenses the kibbles (less resistance, therefore less effort from the machine) and 2) I put very little food, meaning I replenish it every day, so that the weight of the kibble does not strain the mechanism and cause it to get blocked.
I doubt it will last a year of operation.

Pros:
1. You can adjust the number of feedings and the frequency as you wish (unlike others, which have up to 4 feedings per day).
2. The app sends you a notification for each feeding, confirming that everything went well, and also notifies you when the food inside is running out.
3. It makes a beep sound, which although not very loud, is enough for the dog to know that the sound means food is being dispensed and it runs to eat.
4. Good value for money.

Cons:
1. The app is not reliable. It has given me a notification that the feeding was not successful, even though it dispensed food.
2. The machine frequently loses connection to WiFi. It does dispense food at the scheduled time, but I do not receive a notification that the pet has been fed. So, as I have a dog with low sugar levels that needs to eat every 4 hours, I do not have confidence whether it dispensed food or not (the notifications show nothing, since it is offline).
The solution to this is to unplug it and plug it back in to reconnect.
3. Each portion may be 10g, but 2-3 times that I measured it (setting it to dispense double portions), it was 17-18g. Sometimes 20g. Of course, it can never dispense exactly, because all kibbles (and brands) have different sizes/weights.
4. Detail (but it was a headache at first until I synchronized it), if you have a modem that provides 5GHz (newer, faster modems), you need to connect your mobile/tablet to the 2.4GHz to sync with the feeder, otherwise you will struggle unnecessarily.
5. If you take it on vacation, it is better to reconfigure it from scratch. It may retain the settings... or it may not.

Conclusion: If you use relatively small kibbles (e.g. for a Westie-sized dog), and there is no serious problem if it occasionally doesn't dispense food (note: it has not happened to me... at least not yet) or if the quantity of food each time is almost what you would like (because I weigh how much I feed), it is a good choice in terms of price/quality. (€84.60)

Personally, I don't know if I will keep it. I have had it for 3 weeks and I have already exchanged the unit from the store I bought it through Skroutz, and it presents exactly the same "issues" as the previous one (the ones I mentioned in the cons).
I hope this review clarifies whether this product is suitable for you.