I have a Rabo Credit account and am very happy with it. Am approved for 21k+ so I get charged 8.15% variable interest, regardless of what the balance is. I'm sure I could get a better fixed rate loan, but the flexibility of the Rabo Credit account is what attracted me to it. I have made several over-payments and also drawn more money down in the past, and it was all simple and straight forward. Only downside I could find was that if you want to make lump sum payments you have to go directly to Friends First. I would prefer if I could transfer money into my rabo savings account and from there into my credit account. Not a big deal though.
BTW, I am not affiliated to or paid by Rabo.