just bought my 3rd necklace from Amberbebe - the first two elsewhere (one was ebay; not saying the other on open boards - PM if you want to know) and while they were cheaper I'm not 100% sure they were baltic amber. The first I have the string break (ebay - didn't lose any beads as it was knotted between beads) and the second worked like it was supposed to - DS kept pulling on it and it released the ring thing where it's supposed to but when I tried to fix it so he could use it again it released with the slightest pull from DS.
Had really good customer service from Amberbebe -I ordered last Thursday and they rang to check if it had arrived yesterday but I wasn't able to take the call then. Rang them back today and even though it hadn't arrived yet they are sending out a new set for me today so I should get it Tues next week (public holiday here Mon).