I was asking all sorts of questions about CAM in here this time last year.
After considering various offers (mainly Ulster Bank, First Active and BOI) I decided to go with FirstActive CAM even if they were not the cheapest. I used Karl Jeacle’s calculator, and put in a monthly prepayment of a very optimistic 400 euros a month, which seems to reduce the mortgage term and real interest paid by about 40%. I know I ignored many important parameters in the process (rising interest rates for example), but what appealed to me about CAM compared to pre-paying a ordinary variable-rate mortgage was, as ClubMan mentioned, “no restrictions on variable lump sum prepayments” and as Sarah mentioned, even if you are prepaying it, its accessible to you if you need it. That is, if I have a thousand euro spare sitting around, I can considered it as pre-payment towards the mortgage, but if I need the cash, I don’t need to go back to FA or someone else and take a new loan (at a much higher rate).
However, as the OP posted, the catch is that its really hard to keep money in your “current account” – when you have money sitting around in an account and accessible to you in a moments notice, you starts dreaming about that expensive holiday or the car that you always fancied. Then there are other things like slightly higher interest rate, mortgage protection costs more etc too.
I personally would stick around with the CAM for a while longer till the mortgage balance gets near or around LTV 60% of the property value, where the interest rate gap widens. I have no complaints about the CAM sales pitch either – harsh world, everyone for their own etc etc…