We stayed at Kukun for a month and we really liked it. The appartment is spacious and has lots of storage which we loved. We also loved the weekly free cleaning and the super friendly staff. There are great supermarkets and shopping nearby.
The bedrooms could profit from a bit more furniture (small desk/ chair) but that is only relevant for long term stays with kids in school/ home office.
Also, the prices fluctuate heavily (dynamic pricing) from one day to another which made booking it a bit difficult and extending it unattractive.
Overall a great option for Mexico and we would stay there again (depending on the current price ;))