I'm 4☆, my sister has never cruised.

[MogeyMan]

How will this work, re: laundry, specialty restaurant discounts etc? Boarding?

 

Thanks

[oaktreerb]

Will you be sharing your stateroom?

[sciencewonk]

From the HAL website:

All guests sharing a stateroom as part of the same booking will receive the benefits earned by the guest at the highest Star level. Guests sharing a stateroom under different booking numbers receive individual Star level benefits (this includes 3rd & 4th guest sharing the same stateroom). 

[MogeyMan]

Thank you

[Haljo1935]

If she's traveling with you on same booking in the same cabin, she'll receive your benefits. 

Safe travels- enjoy your cruise!