We too used Certergy Ezi Pay for a new lounge and Lounge room furniture.

They were fantastic and we never had any probs with them at all. The payments came out every fortnight with no intertest ever!

We have also used the GE interest free (like you see Harvey Norman etc advertising) and they were terrible. They say its intertest free but you get charged a monthly 'book keeping fee' and if you dont pay it off in the interest free period then the intertest is something stupid like 23% !!!!!

I would def use Certegy again they were great!!!