I just signed up and DL works for me, along with AA, AmEx, Avis, BA, CO, HH, HY, MY, PC, WN and UA
My problems are with ANA, Hertz, Qantas, US.
Security of Your Data
Your personal account information is protected with 256-bit Secure Sockets Layer encryption so that you can be assured that your information is safe.
This statement alone make me wonder.