We ordered the Vifah teak 12" x 12" deck tiles, delivered in May 2014.  Warranty lasted 1 year.  After 2 years the wood not only began to warp, but the snap on plastic bases became brittle and broke up.  These were installed on a covered deck, protected from rain and sun.  They looked beautiful, but I am so disappointed with them.  $900 down the drain!