Esi pos ta pas me ton .....?
And you? How are you getting on with.... ?
Sigoura tha stazete meli.....!!!!!
You must be getting on like a house on fire! or You must be all sweetness and light!
Pravo etsi na stazete...
Good for you, that's the way to go /be.... (depending on above)
aksizi ton kopo
it's worth all the work/it's well worth the trouble....