We had a fabulous stay at Zest.  Tina & Petros work so hard to create a home-from-home experience.  
We loved: 
- the pre-arranged airport collection & welcome drink
- the breakfasts : tasty homemade veggie cakes & mini-wraps,waffles, biscuits & muffins,locally sourced brown bread & eggs. Tina uses their garden produce so well
- the clean pool - beautiful & peaceful setting - with flowers around,the honesty bar, 
- the well equipped kitchen,: real oven, filter coffee machine, mini grill & good space. Zest also provided washing up liquid & cloths/ tea towel - unusual for an appartment. The  coffee mugs, glasses nice & plentiful. 
- the free wi-fi worked well
- the cleanliness throughout, regular changes of linen & daily bathroom replinishment.  it's like a hotel but with advantages of an appartment -the good amount of space: two bedrooms,for three adults), the outdoor & indoor sofas were relaxing. The beds were confortable, air con in all the rooms& a clothes airer 
The appartments are 10 mins from Xi Beach and opposite a car rental company which made hiring a car easy.  There are 4 buses a day which we caught outside the appartment.  This helps - given that there is only one  limited mini-market nearby.  There are taxis - we took one late evening 10 Euro one back from Lixouri. We did frequent trips by regular ferry from Lixouri to Argostoli
It was a joy to meet Tina & Petros, friendly, fun, and caring.  Thank you for everything - we loved our visit to beautiful Kefallonia