We booked the front first-floor apartment. There was a spacious balcony - overlooking the main road, a supermarket car park, and some electricity pylons. Some of the ground floor apartments have much less sitting-out space and you'd be nestling in rough familiarity with your neighbours.
The apartment itself was bright and spacious. Julie cleans every 2 or 3 days and sheets/towels are regularly changed. The kitchen is fairly well equipped but if you plan on doing a lot of cooking you'll need to be creative. A sharp knife and a dustpan & brush would have come in handy. Julie did her best to fix the wi-fi but the signal was weak. Never mind, there are other available networks.
Julie lives nearby, is very friendly, and will give you suggestions for outings, especially arts and cultural events.
The beach is about 100m away across the main road. It was never crowded when we were there. There was a NW wind ('Meltemi') blowing for much of our stay, which is apparently common in August. This can make sea-bathing a little rough for some tastes.
Kokkini Hani is described in the Rough Guide as "grubbily nondescript". We think that's unfair. We'd go for "sleepily ramshackle". It is not a clubbing, youth-oriented resort like Hersonissos and Malia along the road. It's got all the facilities you will need within walking distance. (The mini-mart opposite the apartments is cheaper than the gleaming big supermarket next to them.) Like many places in Greece it has too many cars and not enough pavements.
It's easy to get around - we had a couple of excellent days out by public bus, changing in Heraklion.