Price to book retreat per day when on board

[jessie36]

We have two week cruise booked to the med April 27th on Azura and there will be a number of sea days. Does anyone know how much the retreat costs per day when on board or is it worth our while booking a spa package which includes 3 days in the retreat which we can book in advance and includes other bits for£275pp. Any advice appreciated :)

[sotonjoe]

Think it was £20 or £25 per person per day, but it does seem to vary.