TL;DR = The place is simply fabulous, huge in size and strategically located in the middle of Amoudara area of Gazi close to everything one needs, including the beach, the restaurants, and a big supermarket. A small setback is slow internet at max 3Mbps, hopefully, it will get better in time. Nevertheless, we highly recommend this place!
One of the hosts, Andreas, was very welcoming from the start and answered all our questions throughout our stay on Whatsapp, this was an enormous help to us to navigate the local rules and places. The apartment itself is extra large by all means and provides space for everybody if you have a larger family. There is nobody below, and there is only one old neighbour with a dog on the same floor across, which makes it extra quiet. The views are amazing from the balcony, it's great to chill in the evening watching the ferries depart from the port in Heraklion. We used it a lot. There are two airco units, in the main room and one bedroom, the other does not have one. Two toilets are excellent for a bigger family.
The location is superb in the sense that it is not in the crowdest part of Amoudara/Gazi which is further west, and it has plenty of places to go to. Good steak place next to it just down the road, and we recommend the taverna Aris Katerina on the way to the beach and Mitato, though the prices have gone up in the latter. Very welcoming people and generous portions. The beach, about 200m away in front of you, is long and accommodates for everybody, there are places for hotel guests only, but also has sunbeds with the bars where they are free as long as one orders anything from them. Or there is plenty of free sand. And the waters were babymilk warm in July. If you're into sealife bring your goggles, there is enough fish to see when swimming. For groceries, we recommend Sklavenitis, large supermarket with everything you can imagine, about 1 km away. The staff speaks English which is a great help as all labels are in greek. And few small supermarkets are close-by for 6pack water/beer etc.
The kitchen is well equipped with lots of plates and glasses, the oven is electrical and you can bake in it. If you like cooking a lot, it would help if it had a little more attention to the little kitchen things like knives and boards, but we bought a few and left them for the next people to enjoy. Generally, all hosts on AirBnb have to pay more attention to the kitchen if people are renting a place for longer and are not planning to visit restaurants all the time no matter how cheap they are (they are cheap). But overall everything is there, kettle, drip coffee machine, large refrigerator etc.
The hosts got a new amazing smart LED TV so you can enjoy YouTube, Netflix etc if the connection allows. Unfortunately, the internet is on the slow side, and even though Andreas tried to communicate with the provider on our requests, it may have been a general technical issue on the island, it did not improve much during our 3 week stay being between 1.5 - 3 Mpbs. It is enough for a youtube stream (not 4K) or one Zoom video call, but if you need a professionally faster internet as a freelancer during a workation, ask again what the current situation with it is.
Along the main road, there are plenty of agencies/ car rentals that offer the same thing, please do your research, ask for a discount and choose the cheapest one. For excursions to Santorini specifically, we managed to get some discount, as well as for the car. It helps if they are confronted with a counteroffer from a place nearby. Beware if they attempt to charge you % on top for the card payment, if you have a EU card with SEPA/IBAN there is no commission on the pin payments regardless of what opposite they may be saying. They just want cash - but the ATMs charge extra for the cash even for EU cards. So either bring your own or insist on paying with a card with no commission. Credit cards may be a slightly different matter.
For taxies, there is a taxi stand down the main road west, about 300m in front of hotels, if you intend to travel frequently, it helps to collect the driver's business cards and arrange the rides directly over whatsapp. Overall, the private transfers tend to overcharge you specifically on the way to/from the airport (by 2x) as the price is 0.75c per km and seating is 1.20, it should be about 10eur ride but they charge 20eur - all of them. So get your distance right on google maps and negotiate accordingly. The main road has busstops with busses going to various places like Heraklion or the airport at random unknown times.
To summarize, our stay in this apartment was very comfortable and we really liked this part of Gazi. Thanks, Andreas for all your help! We wish all other guests as much joy as we had here!