If she can break into a higher end market fair play but the whole brand and look of the jewelry has always struck me as something you'd buy in Powerscourt shopping centre for 500-1000. Even the wedding rings don't really look expensive, it all looks and feels a bit costumey. I wouldn't be one for splashing out on jewelry at all but I can appreciate the look of good stuff.
The twig style jewellery i personally looked cheap and in my opinion it will date quickly. She seems to have moved away from that style a bit but it's massively overpriced for what it is. If I had that much money to spend on a ring I wouldn't go to Chupi.
I got a necklace as a birthday present almost 2 years ago. Part of it broke less than 3 or 4 months later and it has to be sent back for repair. That was after only occassional use.