We recently completed two cruises with Princess Cruiseline. I can say that my wife has purchased jewelry, mostly from Diamonds International. On our first cruise, we met one of the representatives of Effy boutique onboard and again saw him at the Diamond International on shore. He was extremely helpful, however, we did not buy jewelry at that time.
The next cruise, my wife was wearing her Tanzanite and decided her pendant was not large enough. We went to Effy onboard our next ship and purchased a pendant and earrings. The representatives were again very helpful. This was our first jewelry purchase onboard the ship and must say we are completely satisfied.
A couple years ago, we purchased our Tanzanite off the ship at one of their recommended jewelers, along with my brother and his wife. My sister-in-law's ring was resized as we waited, but when she returned home, she noticed the stone was not set right. She contacted Princess and sent it in to be repaired. Within 3 weeks, she had it back and wears it to this day.
It appears from the reviews that ring sizing is an issue onboard at Effy, but with all the jewelry sold, there can be an occasional mix-up. We found that Princess works very hard to stand behind their product and services. We would not hesitate to purchase jewelry onboard at Effy.
Bottom Line: Yes, I would recommend this to a friend