We stayed here on our last night in Crete to be close to the airport for an early morning flight, and this place did the trick. En Asti is very centrally located in Heraklion - you're in a quiet pedestrian street but literally just one or two blocks away from the main areas full of restaurants and bars, which is incredibly useful for a 1-2 day stay. The apartment is compact, space for a solo traveller or a couple, and has all the amenities you need (oven, hob, coffee machine, fridge) - at the price point you pay you can't expect much more. The only negative was that we found the bed quite hard and had an uncomfortable night's sleep - we only stayed one night so it wasn't much of a problem but if you're staying for longer it may be an issue.
Overall the apartment is good value for money in a great location for a short stay in Heraklion!