Almost every meal we had in Arillas was great... We ate mainly at Brouklis (Hi Dimitris!), Thalassa, Kostas on the Beach - in that order. Many people recommended Portofino but we didn't try it.
Loved the Keftades at both Brouklis and Thalassa (although both totally different)
Chicken Souvlaki at Brouklis great, not as good at Kostas but OK
Bread and wine at Kostas brill, other food good, ambience great
Stuffed port roll at Brouklis absolutely yummy, enjoyed spit roast lamb and chicken there as well
All main courses spot on at Thalassa, although more expensive
Also - try Mon Amour in Kavadades - booked our (free) minibus transfer at shop at Kaloudis Stuidos