Alkis really is a superhost.:-) He's very kind and always available if you have questions (which restaurants he recommends, where the closest stores/markets are etc.) or in case you have any problems. His response time is very quick! It's very important to him that you feel happy and that you can make it a pleasant stay/vacation. I also asked him re taxis from the airport and he organized a driver who came to pick me up at the airport, which I greatly appreciated.
I stayed there for 2.5 weeks and did not rent a car and it was no problem whatsoever to get around; everything you need is within a few minutes' walking distance. If you like, there are public buses (same models as in Switzerland; so really good quality).
The location of the apartment is optimal: only steps away from Nea Chora Beach where you have numerous sections that provide sunbeds and parasols that you can rent for EUR 6-7 per day (for 2 sunbeds and 1 parasol and some also offer free wifi). I highly recommend you check the specific offer and count the change.;-) I only rented a sunbed on my first afternoon and realized later that they charged me more. For some it may be important to note that Nea Chora beach can be rather crowded and it's right on the promenade (mini-mini version similar to Waikiki). But I assume it's absolutely ideal for families and older people. Personally, I preferred to walk 10 minutes to Klasissos Beach/Paralia Nea Chora where there are very few people and you can, by the way, also witness the most stunning sunsets. Some people online remarked that they did not like those beaches very much because there are stones. However, you can find plenty of spots where you can lie down in the comfy sand. Also, the area seems to have been subject to some beautification/clean-up since some of the reviewer's reports. There is a high-end accommodation at the end of that beach, maybe that's the reason for it.:-) In any case, I really enjoyed that beach section; a great place to relax if you like your peace and quiet.
In terms of stores for those who prefer to cook themselves: There are plenty of grocery stores and a few fresh market stores nearby. I did my grocery shopping on a daily basis. Be aware though that most stores are closed on Sunday.
For those who like to dine out: There are about a dozen restaurants along Nea Chora Beach, so only steps away from the apartment (incl. a Häagen-Dazs). Also, you can walk along the sea promenade to the Venetian Harbor with many, many more restaurants and bars and tourist markets (ca. 10-15 minutes). Very crowded though.
I will most probably not return to Chania, but that's merely because my number one vacation destination is the USA and they've finally opened up for tourists again.:-)